Remember, Stiemsma was played hurt most of last year. The guy who started the season blocking 6 shots in his first game wasn't the guy we saw the rest of the year. He never practiced or did shoot arounds. He wore a boot most of the year on one foot and was hobbled on the other.
Now maybe this is going to be something like Walton's feet and never get better, I don't know. But the Stiemsma at the start of the year was pretty dominant defensively. What was left of him in the playoffs was a hobbled shell.
Pietrus was the same way. He never made it back to what he was before that concussion. The preconcussion Peaches was a terror defensively and knocked down threes. The Pietrus in the playoffs seemed to be falling down a lot.