The last WWE game I purchased was Smackdown v. Raw 2006 and I've never thought twice about it. I've never cared for the control systems in the games and from what reviews on here have said, they are very glitchy. I just hate this generation of games in general, whereby patches are supposed to fix problems that should've been fixed in development. It's like the thought of having patches makes up for a sorry development effort.
If they found a way to re-release WM 2000 or No Mercy on the Playstation Store with an updated roster + legends, then I'd definitely buy it. Until then, I'm satisfied to break out my PS2 and play Fire Pro if I really want to play a wrestling video game.