Honestly, 2 is the sweet spot,
i just cant imagine being that one player with 4 other premades which i am therefore forced to play against players a lot higher then me to compensate for the premades :/
Sad thing is that a lot of group premades tend to suck, I see a lot of negativity coming from it already...
Do riot really think theyve tackled the flaming problem? i can already imagine premades picking on other saying "let player X mid, hes premade with us"
or premades blaming everything on you instead of them selfs,
seriously a very bad move..