I wouldn't say that SA has a lock on the Finals just yet. They haven't looked very good against the Lakers, but their chances of getting there sure have increased. Actually teams like Denver and GS should also look at Westbrook's injury as a possible opening. In fact, Clips, Grizz, should all take heart.
But I do think that OKC could still make the Finals. SA is just not that good. But do OKC fans have the stomach to watch their team get back to the Finals with the prospect of once again losing to the Heat hanging prominently over their teams' heads?
From my experience, get there first and let the chips fall where they may. Who knows, with the way this season is going, maybe the Heat will get hit with a big injury.