Wally is a liability defensively, but then you guys have Nocioni, I like him alot, he's got 6 fouls and knows how to use them.
As for Yao I think he'll score alot more this year, to the tune of around 22 a game, but he doesn't seem to have the movement or jumping ability to be a dominate rebounder. Where as he'll be able to dominate the side of the basket he's on, he'll never be able move quickly from one side to the other to get the tough boards. As a Houston fan I was really spoiled during the Hakeem Olajuwon era as far as center play goes. The key to Houston seems to be in the hands of Stromile Swift, if he can score from mid-range and rebound opposite Yao, then the Rockets will go far. Tim Duncan doesn't like guarding Swift because of quickness and leaping ability, and they still have to contain Yao with the likes of Nazr Mohommed and Rasho Nesterovic, pretty week for the best team in the league. Thats the Spurs weakness guarding centers, and Bruce Bowen draws alot of fouls when guarding the T-Macs, and Kobes because simply he's a dirty player. Last year when Vince Carter wanted to clock him I was all for it.