The issue with queueing with more than 2 people.
The main problem I see with this is all the reports it will generate. People tend to side with the people they queue with and team up on the solo people. For example, last game I had a pretty bad jungle. I kept my mouth shut about it until she stood AFK in my lane and fed a shutdown and double buffs. I typed "Wow, thanks for that". ALL I SAID. The mid and bottom lane start saying in all chat that I'm toxic. Then in lobby I get a popup saying I was reported. Now I know I won't get banned over that, but it adds to the overall report count. Is the solution just to mute your team at the start of the game?
PS: I carried the game and won it and STILL got reported.