You have to wonder if the prospects of coaching Evan Turner sealed the deal on Collins going to Philadelphia, though it looked like they were going to get it done either way.
As for the effect on the Bulls? I don't get why people are into Doug Collins at this point. The guy burnt out really fast and was a micro-manager. That would have made him better than Vinny Del Negro as the set up man. He'd have done a great job teaching Derrick how to improve on his mistakes for two to three seasons before not being able to take it anymore.
He had a nice win loss record with the Bulls while coaching Michael Jordan, but it's not like the team had better than expected success over that era. His Detroit teams had mega stud Grant Hill and weren't viewed as overachieving. They also failed to ever advance in the playoffs and missed them his final season there.
He then went to Washington to pretend to be coach while Michael Jordan was controlling everything, at least if you believe the books on the topic. We'll just give him a mulligan on that whole thing, because that whole situation was obviously abnormal.
Throw out the Washington years (or count them as a negative), and you're going back 14 years to when he coached in Detroit and was just okay, and over 20 years to go back to the Bulls where he had playoff success (which I think in retrospect, even that measure is only so-so and not unexpectedly good).
I think Collins is a great guy. In all seriousness, if I could pick my top 10 NBA people to hang out with for an afternoon, Doug Collins is probably on the list [speaking of which, what a great article idea]. As a coach? I think he's an NBA caliber coach for sure, but I don't think he's the right fit for where we are right now given his lifespan, past successes, and length of time from his last successful coaching stint.
On top of that, he'd either need to change his whole coaching mantra (slow it down and micromanaging) or his style would have gone completely against the Bulls strengths as a team. If he changes then you have to wonder how good he'd be doing something different, and if not, it'd be a terrible fit.
Are the 76ers getting a good coach that fits their needs in Doug Collins? Perhaps they are. I think Doug Collins is a great first coach for a young superstar, and Evan Turner might be a young superstar. Are the Bulls missing out? Nope. Collins wasn't the right guy for us now. He might have been two years ago, but not anymore.