In Game Voice Chat (Give it a shot)
I think there should be an in game voice chat implemented kind've like the one in overwatch where once you have entered a game you have the option to join the group chat if you would like to, not using some third party voice chat app but using one within the League of Legends game. I find that many of my losses could have been avoided if only we had been able to communicate better and you don't always have time to type in the game without losing cs or risking being jumped, and most people don't have the same third party voice app as others making it really hard to coordinate a team voice chat that everyone will be able to use. The system could be entirely optional, you wouldn't have to join it if you didn't want to and could still mute players within it, I just think it would make coordinating things within the match so much easier, think about it and upvote if you agree!