Blizzard has been making notes on all the Overwatch heroes and is preparing to make some balance changes, including tweaks to McCree and D.Va.
Here's what principle designer Geoff Goodman had to say:
"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.
"That said, it's probably a bit too good at dealing damage to higher health targets such as Tanks and barriers. I don't have any concrete changes yet, but I'm going to be testing some things internally to see how he plays."
He went on to clarify: "By saying 'it's probably a bit too good at dealing damage to higher health targets' I mean his flash/fan combo, not the flash itself. Fan is more likely to see changes than flash at this point."
Regarding D.Va, he said: "D.Va's damage is definitely on the lower side, much like Winston's. They are this way for a similar reason: They are both very mobile and hard to kill. Every character in the game has strengths and weaknesses, it's part of what makes the teamplay work well.
"That said, I do think the is some room for some D.Va improvements, but these are unlikely to take the shape of increasing her damage output significantly."
Overwatch is out now for PC, PS4 and Xbox One.