To have him locked up along with their core of stars is a going to be a real asset in having this team grow together.
Yes, if everybody else on the team plays well, Perk won't be a major problem. But for all the talk of Perk's toughness and defense, he's essentially Erick Dampier so far through his career when it comes to on-court production.
Mike
Well, in his prime, Dampier was a very good center, and Perk is a significantly better defensive player.
The thing about the Thunder is that they have their core. They don't need to make any more big moves, they only need to lock up Westbrook and Harden, and then just grow together. They were in a very different position than the C's, who do not have their core in place, and who really need to keep cap flexibility to add some stars around Rondo and Pierce going forward.
So, locking up Perk doesn't really hurt OKC's ability to get better. Yes, they could have had some more cap space this summer, but I don't know if they could have gotten anyone better for it (and wouldn't have gotten anyone better for the kind of money they paid Perkins, which was a bargain compared to open market value). Chandler will be locked up by Dallas, Memphis will match on Gasol, and while Nene may not even opt out, even if he did, they may not have been able to afford him.
Perk on the other hand fits in very well with that they need at that position, and he will only get better as he continues to recover.