Watching the short scene of Cooper "catching" ball... I thought that having in mind his state of mind, he has done some pretty awesome stuff already. Of course, it comes with supernatural help and some of his "instincts" kicking in, however just imagine how powerful Cooper will be when he will wake up: support of both sides of the lodge (giant and erm... tree), his conscious and subconscious joined and trained by being in another plane for years... This kind of half-god power could easily solve everything in 1-2 episodes in "deus ex machina" kind of way. Maybe that's why he stays in vegetable state, because when he will wake up, things will end...