Idea: Champion Based Normal Games MMR

Let's say I'm an Annie one trick at plat 2, but because I only play Annie in all queues my MMR is too high to try to stop one tricking and practice another champion, I'd get wrecked in every stage of the game, and it's not fun to play for the first time and get wrecked 10-20 game before you start becoming ok with the champion, and the higher you are the more time you'll need to gain the skill to play a champion at your ranked level, this fact boos people off trying other champions, and gets them into creating a smurf to practice other champions in lower MMR, why not just make the MMR based on which champion you play, if you're a god fizz and you want to learn yasuo, but you're so so bad with it, why not get matched with people who are as bad so that you can climb and play at the level you are at.. rito please.