Posey is not as vital as is being suggested. Yes, I want see him resign or extend or whatever, but I don't think it's all over if he doesn't. Cleveland would love to add players, but who are they going to get? The Knicks? Atlanta? The C's are far beyond what we saw in the 1st 2 rounds, remember Allen was in a horrendous slump, they hadn't played together in the playoffs before, and Doc wasn't the Doc he is now. The key is to get home court again. Remember, we are returning our entire starting lineup back! Posey would be nice, but are you telling me Ainge couldn't find a way to replace him? House as well?
I think Detroit is going to have a tough year next season. New coach, is Rasheed back? etc. As I look at it right now, even without Posey, PJ, or House, the C's are the overwhelming favorite in the East. If they can get home court and close out the early rounds as they should, this team has a nice chance to be back in the finals.
Remember, there is the draft, there are players developing, there's big baby, etc. I am extremely hopeful about next season and looking forward to opening night when they hoist #17!