Mei is already deleted from the game. The only thing she's used for is first point defense on hanamura to trap people inside the choke.
Perhaps that's how it plays out at your level, but for me playing Mei on pretty much any map with interior chokepoints is a guaranteed headache for the enemy. Anubis, Hanamura, Numbani and Dorado are good candidates. Mei's strong suit is isolating one enemy and killing them without much problem. If you put her in a chokepoint you can just wait for a group to come in, place a wall to trap one guy and kill him. I almost never place a wall to block damage or to prevent people from making progress, the main use of the ability for me is to trap single enemies. She's also great at wasting time which is useful on control and payload maps.
By the way, anybody else really really hates the control game mode? Not because of its inherent mechanisms, but because of how completely random the outcome seems to be unless there's a huge skill gap. A number of times I've seen the counter go to 99% for one team and then the other team took the point and won.
Also, relevant to my above post
I like how it says "you" for junkrat even though that hero is the epitomized OTP. In my experience, even Hanzo instapicks are more likely to change hero than Junkrats.
