I don't know, I think it's a tough call on the lack of off season moves (which seem to be what most people think is the problem).
When you're the champs, do you really need to make yourself better? I know you got to keep up with everyone else, but when you're already in the top spot, you theoretically can lose a little and still be ahead of everyone else. Especially after the Pistons and Lakers series it looked like we were way ahead of everyone else. It's not like they didn't try to bring back Posey.
I think it could be realistic that you could go into this season without Posey and still be better than last year, especially when you have so many young players. I wouldn't blame anyone for thinking, now that they've all played together for a year, have the championship experience, and the young guys have all seen what it takes and followed the vets example you could be coming in with an improved Rondo, Perk, Powe, Baby, Tony, and Pruitt, and hope their improvement is enough to offset the loss of Posey. It's tough knowing going in and of course hindsight is 20-20.