Wallace isn't the problem, per se. He's doing exactly what should reasonably be expected of him this year: he's slightly worse than last year.
The problem, as we should have seen, is Doc's usage of him. We have a 25 year old center, whose fg% and points are up from last year, while his rebounding an blocks are the same. Turnovers and assists are close too. Personal fouls are down. He's gotten noticeably better every year in the league. Our team has a noticeable problem rebounding. And in case you were wondering, both his raw +/- and his adjusted +/- are in the positive. Are his minutes up from last year? NO. Down.
We have a 35 year old center who shoots .408, has never been a great rebounder, and shoots .296 from 3 but shoots 4.6 of them a game. Yet he's stealing minutes from the 25 year old. Why? All I can see is because Doc's the coach and Sheed's the veteran.
So glad we're killing the confidence and building the resentment of one of the league bargains, a guy who actually LIKES mucking it up in the paint and doing dirty work, two seasons before his contract is up...I would not be at all surprised to see him take a pay CUT to get out of here to a team that wants him.