Good assessment on why the Camby comparison is off-base, Inside Out. KG has never been great at protecting the paint/rim; he's far more effective roaming at mid-range, swarming passing lanes, and causing problems on switches, while the other big man stays home and guards the rim (a la KG and Perk combo).
I've been thinking about this topic a lot since the tail end of last season and KG's mediocre performance in the play-offs. I don't think KG is completely done as an effective NBA player. We don't necessarily need to rush him straight away to MGH to remove the fork. But, in light of what I said above, I think his effectiveness with this Celtics team might be done.
By this I mean, the Celtics are relying on KG to provide both the bulk of front-court offense and defense now, as the Cs don't necessarily have the tandem with the stay at home big man to guard the rim as in years past. Offensively, KG can't get it done consistently anymore, as expected with his age and lack of a traditional/fundamental post game. He's a jump shooter on old legs. Defensively, he's trying to do everything, roam like he wants to from the high post, yet recover (sometimes at least) to protect the rim. He can't do it.
For KG to remain effective in his NBA twilight, I think he needs a situation where he can be the defensive, roaming, disrupting presence he's always been and an after-thought on offense. That's certainly not the role the Cs have him in presently.
Completely random thought, after watching the Mavs last night: wouldn't KG fill some of the void Chandler left for that team? A half season rental of KG might not be a bad gamble for them, and might put KG in a better spot to maximize what he still brings to the table.