Not sure I agree with the premise. I still think the key to winning is (and will continue to be) great players. Spurs do have Leonard, Manu, TD, TP, Green, Splitter, Diaw. Perhaps no true superstar but an abundance of high quality players there -- aging a bit this year and it shows in their record. Atlanta also with a lot of quality players.
And further -- you would bet against Cavs with LBJ, GSW with Curry/Thompson, or OKC with KD/RW?
But regarding the question of whether the C's have a winner in Stevens, I absolutely think so. If the C's continue to play/win at their current pace, Brad Stevens should get some COY votes.