It's time that voice chat is implemented
League of legends, after all, is a team based game. Communication would make the game more fun and strategic. You could coordinate splitpushes, objectives, team fights, ganks, etc . . .
Before someone says it would make league less toxic -
. Many other competitive games already have vc (OW/CSGO), . People are less toxic in VC than in chat. Behind that toxic, flamer, is a 9 yo squeaker who doesn't want to embarrass himself. . You could always mute someone / leave vc.
It is something that can be optional. It will greatly benefit those who want it, and do no harm to those who do not.
At least, you could make it so only people with a certain honor level can use it.
EDIT: a lot of people are downvoting this for whatever reason. Let me reiterate: VOICE CHAT IS OPTIONAL. If you get upset over a person insulting you, then maybe voice chat isn't for you and you could disable it.