Most of the reason soloQ players complain is the unfairness against Skyped teams.
Riot have already stated they've shifted their position on voice chat and are looking into possibilities after the League Client Update.
Though I don't like the idea of voice comms in public LoL (toxic behavior will be near impossible to prove, and thus harder to moderate and punish for), I feel it's needed after this solo queue nonsense. Though at the same time, I feel soloQ are the people who CAN'T work with a team ofttimes and might be the toxic people in the first place.
My hope is that Riot introduce voice comms, they should have a reliable way to moderate abuse made through voice comms as well.