Get off your high horse. All Shumpert does during the Summer is style his hair. Green just turned 30 so to say he can't still improve is pretty pathetic. His offensive game didn't abandon him, the coaching staff switching from a motion offense to halfcourt ISO/post up happy offense did him in, or more specifically, the signing of LMA, the increased usage of Kawhi and Parker's game falling off a cliff. Green is a rhythm shooter and he's most effective when he can catch and shoot in transition as opposed to the Harcourt set. It doesn't help matters when there's no spacing because the Spurs Don't have anyone who can penetrate so Green's good looks are far and few between. His defense has slipped and he continues to get beat by the same play over and over again but he's still legnthy, agile and athletic, all things Shumpert is not. The Spurs couldn't dream of making a starter out of Shump because He's not really good at any one thing.