The trade had nothing whatsoever to do with the end of the season. Perkins isn't doing anything in OKC except banking garishly huge checks. We got more production out of the 5 with JO than Perkins would have delivered. And please, Ubuntu is something fans fall in love with; players are pros and they play with what they have.
As I've said earlier, if Rondo stays, I see no logic keeping the Big 3 together - this formula worked originally because each of the Big 3 was an accomplished scorer and defender in 2008, so Rondo's strengths were a perfect fit - distribution - and his weaknesses - scoring - were compensated for.
None of those three can score or defend at the 2008 level. So either Ainge had better come up with a fourth accomplished scorer for the starting lineup - Chris Paul, etc - and a rebounder who can score some - four PPG a game isn't enough - or he's going to have to move one of the 3 to get a scorer who can hide Rondo's woeful outside shooting.
The recipe in 2008 was genius, but it won't work anymore. Gotta shake this group up.