A "weighted" system for Solo/Team Rating in the same queue.
Could this be a simple solution for the problem with "personal evaluation" Riot has?
If I queue as solo, increase my "weights" for Solo Rating and decrease my "weights" for Team Rating.
Soloing and won = Solo Rating increases a bunch but my Team Rating increases minimally.
Soloing and lost = Solo Rating takes a bunch of hits while my Team Rating takes minimal hits.
Team up and won = Team Rating increase a bunch (weighted based on Duos/Trios/4s/5s), Solo Rating affected minimally.
Team up and lost = Team Rating takes a bunch of hits (weighted based on Duos/Trios/4s/5s), Solo Rating affected minimally.
edit: Solo Players merely want to see how they did as individuals. Honestly I don't think they really care about an unfair queue system. i.e. They don't mind losing to duos/trios or even 5s. But they want to see an individual rating.