Requires the other team to either play a dive comp themselves or else play some heroes that many ppl think are still troll picks (Torb, Junk, etc). Just saw a Your Overwatch video (best Overwatch youtubers around btw, everyone should check out their videos if you haven't already) about how Junkrat was being used by a pro team on ATTACK to help fend off the divers since he can't damage himself anymore.

The competitive system still has many flaws, but the balance of the game itself has never been better. Dive is pretty dominant, but it requires alot of skill and probably wouldn't be as dominant if more people were willing to experiment with unpredictable comps.