so I haven't seen the Warriors play too much this season, but I think I get why they've been playing better without David Lee, their 20-10 guy.
the most obvious reason is more shots for their red-hot trio, Curry/Klay/Jack, but also - Lee is probably the worst defender and screener among "star" players that I've ever seen. seems like if the Spurs need a two, their best bet is to screen off the ballhandler's man, locate Lee on the floor, and drive at him.
he is also a horrendous screener. but he is also responsible for screening a lot (presumably because he's a better shooter than Bogut). but he might as well not try. the idea of a screen is for the ballcarrier to get a step or two ahead of his man, and now the defense is off balance, has to rotate, and all these good things happen for you. particularly dangerous if Curry's the ballhandler because he only needs a half step and a sliver of daylight to hit any shot.
but Curry was getting no separation at all from his man on Lee screens. could be because both are injured, but I doubt that's the only reason. seems like Lee's approach is to put only the minimum effort in setting the screen, because he's too eager to slip or pop to an open area of the floor for a jumper
when Bogut or the backups set a screen, they make sure they make solid contact and Curry or Jack comes off the screen with some options and the ball starts moving better