Ranked 1v1 and Ranked 5v5

I feel like these are the only two game modes that should exist aside from normals, 3v3 and ARAM (etc..).

1v1 -- Well, everyone wants to prove their skills and prove they're the best in the game.

5v5 -- This is the true meaning of the game. Post in the boards, get 5 friends(maybe some you fought hard in 1v1), but you need a premade party and take on another premade party of 5.

It would eliminate a lot of toxicity, no?