Built in voice chat will solve absolutely nothing
In many occasions strangers in my team had invited me into discord calls, which means altho we were facing premades us solo players were with voice chat too, that is what Rito said in their post about voice chat. But it solves absolutely nothing. STRANGERS ARE STILL STRANGERS, being able to hear them talking does not mean we all in a sudden have synergy and recognize which voice belongs to which player.
Adding voice communication into league is not the way to fix dynamic queue, flat out removing it is how you can fix it.
Bring back solo queue.