Displaying Teambuilder MMR

Classic PVP's skill is best indicated by your rank, but most players aren't going to be equally skilled with all champions/roles across the board. For those, I propose allowing the player some level of indication of what their MMR is in teambuilder. Now, I'm not suggesting the player be able to directly view their MMR. That's hidden from players in classic ranked by the league system. I'm just suggesting that players should be able to view something to tell just how good they are with various champions.

Why do this if you can see your win rates with champions in ranked? Well, in ranked you only ever see your win percentage. If it's over 50%, it's above your MMR and below is below, but that's a bit vague. Also, ranked is not the place to practice a given champion/role, teambuilder is.

The attached image is a concept I quickly whipped up.