Why isnt there a team builder for ranked yet?

I'm sure people have asked this before, but why not? I understand the argument of counter picking, but theres a simple solution for that. Everyone picks a role, but not a champ.Your team gets shuffled around and paired with another team. The counter picking still can occur, and MAYBE your team will even have enough time before picks and bans to communicate who they want to ban and what type of team comp they want (seige, poke, split push, carry-centric).

When 5 people get randomly paired together with distinct roles, it will cut down on the toxicity that you see in champ select. Also it will lead to a much better in-game experience for people.

The argument that you want to get players to experience more than just there favorite role is a weak one at best. If I want to learn how to support more effective, ranked play is not the forum to do it in. Normals are.

I would gladly wait on a 5 min que to get the role I want, than to get stuck with a role I am not fond of playing, and be forced to play 30-45 minutes. Yes forced is figuritive here. I realize you can dodge for 5 point loss. but if thats your counter argument, this whole thing has gone over your head.