Could some of it be a concern about the center rotation going into the playoffs? As much as I'd like to, I just can't find many positives in Shaq's recovery from injury.
Is a center rotation with Perkins that much better than a center rotation with Kristic when we consider our likely match ups that it would be worth going into the playoffs with Pavlovic as our wing back up?
I think this is a bit of a straw man, because if we hadn't traded for Green, we would have gotten a better wing than Pavlovic. There are reports that we could have had Anthony Parker, and I think he would have made a fine backup.
And yes, I think the difference between Perk and Krstic is significant. That being the case, with Shaq's injury issues I'm very worried about our ability to adequately control the paint in the playoffs.
Just out of curiosity, if Perk has another injury does the balance shift the other way?
If it's a serious one that jeopardizes his availability for the playoffs, absolutely. In that case, from a hindsight perspective, we would have acquired Green and a #1 for a player unlikely to have helped us.
This whole idea (retrospectives, generally) go off the beam pretty quickly, i.e. if Perk does happen to get injured, say steps on a foot and gets a high ankle sprain, out 3 weeks to start the playoffs, we could ask whether he would have stepped on someone's foot if he were playing in a different place/time/team, etc., which is just nutty.
Not to get too philosophical here, but humans, having an awareness of themselves, have to live with the knowledge of the precariousness of human life itself, uncertainty of the future, and all that. There have been countless works on this topic, most quite boring and laborious to read, but interesting if read in summary. Short version: there is certainty and uncertainty, which parallel knowledge and belief. We can't "know" things that are not certain, right? But acknowledging uncertainty is quite uncomfortable, so round and round we go re-affirming beliefs, or digging in to defend beliefs rather than face uncertainty.
Folks, it's basketball, a sport for entertainment. We don't know what's going to happen, and never did. Nothing is certain, including whether our chances to win it all immproved or not with the trade (since winning, as we know, is not easy and requires a large number of variables to sync up at the right time, including health. Remember the Rondo 3 in 08? We don't win the title without a Rondo 3 in the playoffs. Would you bet on that? How about Pierce's miracle bounce on the free throw?).
None of us "know" as much as we usually let on around here.