"League is better when you play with friends" -Riot
So sure, I think that it is a pretty legitimate statement...However, it isn't right.
The fact that your organized premade is able to stomp the other team is "fun" for you, but comes at the expense of 5 other players makes it unhealthy. Its just like playing an extremely overpowered champion, Its fun for you to play and stomp the game with, but not for the opponent to play against. You see, OP champions get nerfed...but OP gameplay doesn't. I mean, think about it, what downside it there being able to talk with your teammates and know their playstyle after many games played together? ITS FREE ADVANTAGE. Look, I get that DQ is going back to solo que, but god damn, even normals can just feel horrible to play against 5 mans. Why do I have to sit through 20 minutes of 5 man rotations, feeling helpless, virtually nothing I can do as a solo VS a 5-man hive-mind-monster, while my 4 non-premade teammates are sitting in the same boat "attempting" to get organised with the strangers on their team. While the other team is laughing on their voice coms, spaming that champion mastery when they didn't do shit and their teammates did all the work. Look I get that you are a bot lane main and want your support on voice with you, duo que is fine, But 5 man vs 5 solo is NOT. I'm not saying "remove 5 man" just play that shit against other 5 man groups EVEN IN NORMALS
Again/tldr: Fun for YOU at the expense of the other players