2. The Hornets team is a train wreck. I don't think it's really fair to say that Pose is playing poorly. He's got no real role on a team in a total state of flux. I think Pose is best when he has a stable clear role and that is what he would be coming to in Boston.
Posey is not playing defense, not rebounding, and not hitting shots. He's not dependent on others for his own defensive + rebounding contributions. His shooting could just be a cold streak.
It's way too early to say what the lasting effects here are --
a lock to improve but by how much? All the way back to where he was in 2008/09? Impossible to say -- but until Posey shows more ability I'd be unwilling to take on a contract of that size.
Edit: Sorry, clicked post by accident.
1. The sample size on Alexander is a lot less than POB. I would consider Shelden a closer comparison in terms of gambling on a young than POB (and Shelden has been a nice surprise). I know SL is a crap shoot, but he really did look like he had made some adjustments to playing at different level than college ball. Depending on the price tag, I would be pretty interested in him because he could be a nice piece for the future too (although I think he becomes a FA at the end of the season...not sure if we would have any special claim on him).
(1) Joe Alexander has shown no capacity to defend any position at even a serviceable level. Not in regular season games or in summer league.
(2) Joe Alexander is a poor jump shooter who cannot space the floor (16-18 feet range and not that effective with it). He is an inefficient scorer at SF (mostly post up turnaround J's) and a slightly efficient one as a PF (turn and face, attack with speed, gets to the line, versus slower PFs).
(3) Joe Alexander is a mediocre rebounder for a SF and a liability for a PF.
At both positions Joe Alexander gives up more defensively + rebounding than he creates offensively.
This is not to say that he can never be a serviceable, or good, NBA player. Just that he isn't one now. You take a flier on him and hope he develops into one in a year or two. Patrick O'Bryant isn't the best of examples because he never had enough talent/potential to succeed, whereas Alexander might, but it's a similar non-ability to contribute now sign for the future type of idea.
I'm all for acquiring Joe Alexander at a low cost. That looks like a good risk/reward idea. I just don't think you can ask him to be a rotation player this season.