Blizzard appears to be looking at Overwatch heroes McCree and D. Va with regard to making balance changes.
With McCree it’s Fan the Hammer that’s the issue when used in combination with his stunning Flashbang grenade. Fan the Hammer looses a round of ammo in the blink of an eye and almost always kills a target at close range. And if it doesn’t, you can use McCree’s Roll ability to automatically reload and then Fan the Hammer again. Chances are if you’ve played Overwatch then you’ve been killed this way.
This is (via ): “I’ve been watching McCree carefully since we’ve released. McCree’s Flashbang plays an important role in being a strong option against very fast/agile teams (Tracers/Genjis/etc). It is also a nice tool to prevent close range devastating abilities and ultimates such as Reaper’s Death Blossom.