Remove in-game chat.
This will make the game 10000000000000% better. Here is how chat is used as of now: 97%-toxic flaming 2%-the occasional "nj" 1%-actual game strategy and yes, i looked these statistics up on the FBI website As you see, the in-game chat feature is nothing but a hindrance to gameplay. Pings work well enough to convey gameplay strategy. Maybe only allow chat for Master\Challenger tier, but the lower elos DEFINITELY don't need chat