I believe that many of you are, unfortunately, missing the point. Speaking for myself, I wrote here, right after Posey signed with the Hornets, that the best option would probably be to re-sign Allen and House and stand pat. But this doesn't mean one can't make an assessment of the strengths and weaknesses of our current roster. When people say that this roster is "risky" and has notorious flaws, it means precisely that, not that "we don't have a chance". That's a straw man argument, something civilized people don't use. Just saying one is silly to be concerned because "nodoby knows if a rookie can step up or not" is nonsense. That's precisely the question: not knowing if a rookie can step up or not. Saying it doesn't matter because the roster will chance before the playoffs it's something I don't quite understand as well: what's exactly the point? We are talking about what we need to do to improve this roster, as it's currently built. Or saying that Ainge didn't mis-calculated anything. How do you know? How do you know Ainge didn't gamble with Posey, missed his fallbacks while doing it and then Posey's agent didn't allow him to match the Hornets' offer?
Another fallacy is using an argumentum ad verecundiam. That's in very bad taste, IMO. Let me ask you something: do you consider signing another veteran, say, Bonzi Wells or some backup center, in the next few weeks:
1) a good move
2) a bad move
3) a good move if Ainge sings someone and a bad move if Ainge doesn't sign anyone
The point is: at this moment our bench lacks experience, size and outside shooting. I guess we can all agree on this, no?