I had a bright idea. If riot started keeping statistics of peoples use of push to talk in competitive games, they could change the matchmaking algorithm to try and put at the very least 3-4 communicative players on the team. There would be a minimum requirement to qualify as a "communicative" player, something low like having spoken above 5 or 10 times in average during the last 10 competitive games.

But what about players who don't have microphones or don't want to communicate?

To solve this for players who want games with communication and do have a mic, give players an option in game;

"Only put me in games with other players that have a microphone".

This would try to guarantee competitive games with voice communication. Of course it won't say much about the quality of someone's comms. But I feel like this would really be a win win for everyone. Players who don't have microphones or do but never really speak during the match, probably dont care about being put in a game with few comms. In fact it might incite them to start communicating to get into games with other people that do speak. And then us people who actually do want to strategize and call out can play with other players who also genuinely want to win the freaking game.

It won't have much impact on queue times and even if it does, the fact that you know you're going to land in a game with people who actually use their words in this team play game, will massively improve the odds of actually enjoying that match, and probably reduce the amount of people who selfishly dodge because nobody speaks or someone has no microphone during agent selection.

Thank you for coming to my ted talk. Please let me know what you think.

I feel like a lot of people are missing my point so I'll put it here:

Its not about who talks the most, but about who talks at all.

Then distribute those players somewhat evenly in matchmaking without waiting for talkers to show up, so no impact on queue time. It should be a matchmaking bias not a requirement for putting together a team.

There is no incentive to spam, no split queue, no "communication score", it's binary; you either do or you don't talk.