You're being quite liberal with what "recently" means. He's been great in the last 3 games at the very least.
He plays his role quite well, and makes quite good on his opportunities, 70%+ FG I won't cry too much about it on his limited opportunities.
I don't know, all I see is consistenly late rotations, getting pushed around on defense, and no rebounding to speak of. And this _is_ in the last three games. 10 rebounds and 9 fouls for that stretch is just bad (for what it's worth, it's been like that all season: 43 and 41, respectively).
I am particularly unimpressed by the shooting percentage. The guy takes 2 and a half shots per game, on average, and the overwhelming majority of these are wide open dunks.
I'm just saying that he's been great in the role he plays. I certainly see he needs to improve his rotations, but I haven't seen them being as egrogious as you do. I'll pay a little more attention.
But again, he has quite the limited role, he's not hurting you on offense, and I don't think he's hurting you that much on defense either, though certainly could be better.
If anything, I'd like to see him rebound better, but I think calling him playing poorly is quite the stretch. For that matter, I think he fits really well when he's playing with our starters. His problems are more noticeable when you have also Sully/Bass on the floor since they all have their defensive problems.
Of all the bigs sans Garnett, he's been the most consistent for us on both sides of the floor, but he doesn't bring much, he just fits and enables us to have something that resembles a competent rotation among our bigs.