New Game Mode Idea - Don't you think its about time we have an "Arena"

Its been a long time since league came out. We had many conflicts and many people getting mad at each other. Both at there opponents and there teammates. How many times have you heard the phrase "1 v 1 me!" I think its time for arena combat. A place to vent out frustrations, prove who is the better yasao, teemo, zed,ect ect. Yes there are some obvious trump so champs have over others but can we somehow fix that with a subclass system? Where you can take the 3 spells from another class and use them along with you main class. Can you imagine the fun of mixing 2 classes together? Yasao/zed vs Yasao/aatrox? Sona/ashe vs Malzahar/Yorick? The potential of this is so much fun What combination can you think of Who would you want to see fight each other? Tell me why we couldn't have such a game mode? I think this community is in need of a place to just duke it out!