I hope the people who voted yes, never become our GM. KG, this is giving them the farm, I know your a C fan but this trade makes you look like a philly guy, which I know is not the case.
Olynyk also projects (in my mind) as a decent rotation player, possible starter but he lacks rebounding and defense. Maybe those things improve, maybe not.
I agree about the rebounding, disagree about the defense. Also, I think that it's very unlikely that the rebounding will improve. At this point, no "maybe" about it, probably, or at best an incremental improvement.
Notice that Brad likes to use Kelly as the paint protector in a two/three zone at the end of quarters – even though he's no kind of shot blocker. He moves to the right spot, has great instincts, and as long as he's not exposed, he's a big asset on defense.
He's a rotation player on a contender. If you want to be a contender, you need rotation players, not just stars, and not just starters. He makes good decisions with the ball, plays very good team defense – though for sure he has limitations, such as post defense – and shoots over 40% from three, which puts him in elite company.
I think that Nerlens' team defense is very good, but it looks pretty unlikely that you could ever use him in the ball-movement type of offense which Boston runs, where all five guys are touching the ball. He has bad hands and suspect knees. Kelly is a much better, more well-rounded player – and a much better fit for Boston.
Pass.