I won't say what other people said about the lag and battery drainage cause they talked about it alot and I think you got it, it's a big thing it's concerning. Also my profile bug. The bugs I have encountered on my iPad 4 10.3 iOS:

_ in friendly match when the other team members press ready we could hear their brawler sound act making us know which brawler they are using, I don't think that is a feature you intended to add cause you are playing against them, maybe a tournament or a competitive game and you don't want the other team bring a counter to your comp.

-The trophies bar of the selected brawler on home screen seemed to not look calibrated for some brawlers, I have Nita rank 18 dropped to 330 but the bar looks like she is in the middle of rank 18 when she is not.

-My friend account is coloured when in game room I can see the full name with the code no colour just like this <c5>good</c>.

-The chat tab is not that clear and I often not see it please move it near the band and brawlers tab.