Acquiring Rudy Gay might actually be the move we've all been referring to when using the term "trading for a wing" given how he, on paper at least, should fit in well under Fred Hoiberg and the cast of players currently present on the Bulls.
Now, Gay has been known as a chucker for years, but his career TS% of .530 isn't much below league average, and over the course of the last two seasons he's actually been above it. His 123-game tenure with Sacramento even saw him post it at .561 which would have ranked third on the Bulls last season. It seems that Gay is actually a lot better as the guy feeding off a star, than be the leading man himself. In Chicago, he'd be the second or third offensive option, depending on where Derrick Rose will position himself. Hell, you could even make Gay play off of Pau Gasol once in a while when the others sit, consistently creating circumstances in which it wouldn't be a necessity for Gay to be the primary scorer.
But that, of course, would be under the idea that Gibson and McDermott would be enough of a package for Sacramento. It very likely wouldn't be. Gay was a 21/6 player last year who even dialed up his assist numbers to the tune of 3.7, making him somewhat of a surprising all-around player. Given that his defensive interest can move anywhere from uninterested to highly intense, you're looking at a situation where you'd need to gamble on that side of the ball. If he likes Chicago, and fits in well offensively, there's a larger chance for defensive devotion on his part.
Realistically, what should the deal be?
You're probably looking at the aforementioned Gibson and McDermott, but with Tony Snell thrown in there as well as a draft pick of some sort. The Kings would undoubtedly request their pick back, but since that could actually become the 11th pick in the 2016 draft, you could argue that the Kings would have to choose between that or Snell and a future Top 20 protected pick, which could have a good chance of actually being converted to Sacramento.
Assuming that, you're looking at a team consisting of Rose, Butler, Gay, Mirotic, Gasol, Noah, Dunleavy, Brooks, Portis, Moore, Bairtstow, and Hinrich. That's five bigs, four wings, and three lead guards. More importantly, Gay becomes a solid known, as opposed to Snell and McDermott who are years from reaching his level, and likely will never achieve it.
In short, the Bulls sacrifice potential and some depth for quality.
In adding Gay, the Bulls would get yet another guy who can force himself to the line (5.8 attempts a game) and shoot a high percentage from there (85.8%), thus further increasing their already impressive free throw shooting from a year ago where they ranked third in makes, fourth in attempts, and third in percentage. A line-up of Rose, Butler, Gay, Mirotic, and Gasol would be impossible to foul late in games, and they'd generate a ridiculous amount of points every night just by getting fouled.
Additionally, Gay has begun choosing his shots a lot better in recent years. While he's always been a slasher of nature, Gay began moving slightly further away from the hoop to make room for DeMarcus Cousins, and it seemed to benefit him greatly. It was the first year of his career in which he took less than 20% of his shots from within three feet, thus making him less predictable when on the ball. He was still deadly around the rim, converting on 62.9% of his shots, but 27.2% of his shots came from the 3-10 feet area, and there's a "sophomore Rose"-esque quality to his game, where he attacks from the outside and in, but understands that an open shot from seven feet is better than a contested one at the rim in certain scenarios.
Coach Nick from BBallBreakdown took a look at Gay's 40-point outing against Portland last season, which shows the variety of how Gay scores close to the hoop. He posts up, uses screens to get into the paint, moves without the ball, and utilizes mis-matches.
That sort of versatility would be a welcomed addition to the Bulls where Rose and Butler are more or less the only on-ball creators, unless you want to include Aaron Brooks who can be night and day at creating his own. With three players able to score off their own dribble, and with all three of them capable of moving around off of it, the Bulls would no longer have to wait around for Dunleavy to clear multiple screens, as to present them with a third option. Here, teams would understand immediately that Gay can score in many different ways, and play him close right from the get-go. The same ideology would be applied to Butler and Rose, leaving plenty of space for both Mirotic and Gasol to operate.
Assuming we build on Mark Karantzoulis' two pieces concerning Gasol's role, let me ask a question: With Butler and Gay lurking around the perimeter, would any defender dare letting Derrick Rose go to the hoop in a Rose/Gasol pick and pop, where Rose could just pass it out for when the defense collapses? Probably not. This means the superior choice in the eyes of a defense will be letting Gasol get that open 15 to 17-foot look so they can double on Rose's penetration. With Gasol hitting that baby at an elite level, and this time around would get that shot with more space, we could be looking at Gasol shooting at a 50% clip from that area, making it virtually impossible for defenses to choose right. You could even use Butler or Gay as the ball-handler, which would be additionally terrifying given their size and strength.
... And I didn't mention Mirotic yet.
Of the five players in that group, who will be the guy mostly left alone? The second-year stretch-four, obviously, and this is beautiful for at least two reasons:
1. Mirotic is perfectly capable of attacking off the dribble himself, as well as he is spotting up when receiving the kick-out. With space comes options, and Mirotic did well at reading those options and reacting to them (pump-faking notwithstanding). Teams would try to rush out to contest shots against him, and this is where his pump-faking might become an asset, as he could force defenders to fly into him, or go straight by them when they've left the ground. At 6'10 and cat-quick for someone his size, Mirotic can utilize driving lanes, even when starting from the three-point line. Reading his drive, Butler and Gay could move out further, as to provide Mirotic with more space.
2. As Mirotic develops, his shot is most likely to follow suit. With defenders draped all over Rose, Gay, Butler, and Gasol, a simple extra pass finding its way to Mirotic could become a ridiculously high-percentage shot if he's left with space. Pick and rolls aren't always the end-goal, but rather the beginning of a process of going into other sets. With Gasol working as the primary screen-setter, and all three of Rose, Butler, and Gay taking turns on the ball, you're going to have two of them moving around off of it at all times. There's no way teams are letting Butler move to the corners where he shot 44.7% last season, just as teams aren't likely to let Gay set up camp at the elbow so he can initialize a post-play, or let Rose lurk around the baseline where he can get his floater off. Therefore, as Rose, Butler, and Gay move around (depending on who isn't being the ball-handler), defenses are going to scramble. It's in that confusion Mirotic must take advantage. If his man is stuck on him at all times, Mirotic automatically buys the Bulls driving lanes. That, however, seems unlikely, especially if Gay camps out at the elbow on the side Mirotic is located. Niko's man will likely go to double on Gay after the catch, and from there, it's a simple quick pass out to Mirotic, who will have all day to get the jumper off.
Any sort of Rudy Gay acquisition would present Chicago with a myriad of options offensively, even if it does leave them with a somewhat untested bench. Thankfully, Gay is able to handle big minutes, and you could effectively make sure that two of Rose, Butler, and Gay share the floor at all times, eliminating all-bench line-ups.
You'd also lose the security of Taj Gibson, which is nothing to sneeze at. Gibson has routinely closed games for the Bulls over his six seasons in Chicago, and losing that two-way aspect is certainly not inspiring. You'd almost have to force Bobby Portis into playing big minutes, even if he might not be completely ready, to make sure you have a big who isn't entirely offensive inept, whom you can pair with Joakim Noah.
So yes, there is a trade-off. But the gain in offensively flexibility should outweigh it.