Can we not do voice chat?
League is one of the few games without voice chat, and i find this to be a very positive and unique feature.
Should voice chat be inplemented, it would be an almost mandatory join, as not joining would make the game like dynamic queue all over again.
Not only would it put teammates who don't want to talk at a disadvantage, but teams with the "typical yasuo" type players would start to lose a lot more: that person would be even harder to avoid, and can tilt teammates far easier than otherwise. Its far harder to stay positive when someone is literally yelling at you then when it is just words on a screen.