Moar solo ranked!
Team is obviously for the more "elite" players.
Solo ranked is a really good mode for teaching, and for people to learn. Since most say and live by the belief that solo rating means "nothing" It would make sense for people to try to get this going more often. People dont like to lose and thats really understandable.
When people get put in solo ranked there is usually a mix of people who know how to play and some who need work still. So it sort of makes it a even playing field, and basically what im saying is if people get into solo ranked more and get some reps in....MAYBE it will give them some more incentive to team up with people and go against the more elite players...