They are bringing voice chat! I am so excited!
If you value competitive team play so much, why are you against voice chat? It would really make games more coordinated. In the past, our stance on voice comms emphasized the increased potential for negative behavior. We've since reconsidered our philosophy around voice chat and while there are some challenges we want to overcome (keeping it an opt-in experience, for example), we want to do it.
We believe League as a team sport should reward coordination, and that voice chat is a valuable tool for getting teams (and strangers) aligned. We'll probably begin deeper investigations once the League Client update is in a stable release so we don't have to build the feature twice, but hopefully this is a clear update on our philosophy and where we stand. We'll also give you further updates when the time comes. – New001