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 very impressed by Chris Wilcox's shooting percentage. It is true that a majority of his baskets are on wide open dunks, but he puts himself in a position to get those wide open dunks through his ability to run the floor, not just fast, but smart as well. He's agile and he knows when to cut to the rim and has good timing on the pick and lob.
Jason Collins, Darko Milicic, or Fab Melo wouldn't be able to finish on those dunks. Many bigs are like bulls in a china shop trying to carve space through the lane off picks. Not Chris. He knows how to put himself in a position to finish and how to finish.
His rebounding isn't great, but I've definitely seen improvement on his pick and roll and help defense.
My conclusion: Chris Wilcox is far from terrible. On the contrary, he's giving this team some very productive play, and some much needed size and athleticism off the bench.
I just want to add that he's got a ridiculously high offensive rating of 126 and a very respectable defensive rating of 104. I know full well that those numbers aren't necessarily completely indicative of what a player brings to the court, but, on the other hand, it's hard to say that he hurts the team when he's out there when considering those numbers.
A common mantra seems to be that we completely fall apart when KG leaves the floor. Often times when KG leaves the floor, Chris Wilcox is the guy replacing him, though. Considering those efficiency numbers when Chris is on the court, it would seem that he's doing a nice job filling his role.