I just want the old system back where it was not about pick 2 positions and you will get one of those 2 every time. I learned champs in different positions so I could be useful and versatile and having support as my go too backup option was fine but no longer is it fine to have support as the back up option since you will be getting support.
But the reason why people want solo queue is because they don't like having to deal with mob mentalities. A group of 3 or 4 people all bitching at one player is really demoralizing especially for ranked games. When it was solo or duo at least it was less likely to be a majority of players raging at someone and was usually 1 or 2 players unless something clearly intentional and bad happened.