To be a bit fair, as someone who's ruptured his Patella Tendon and tore an ACL on different occasions, once your body starts breaking down in that way, it's going to happen regardless, sooner or later. It wasn't the same as say, Shumpert's, who made an awkward step, this was a jumping motion, there wasn't anything awkward about it.
With the way he plays, the type of explosive movements and corkscrew actions he makes, if it was going to go, it was going to go, whether it was this series, next series, Conference Finals, whenever. If he kept playing Basketball the way he plays it, he wouldn't have lasted this season.