I'm going to disagree with you.

Matchmaking for raids is just a bad idea. The simple truth is that there are players out there (quite a lot, in fact, in every game) that just don't care about putting in the effort to learn the mechanics or try to help out their team. If they can join a matchmade raid at 1 in the morning when they're half asleep with their mic shut off and Spotify in the background and expect to be carried through it, then it's just a bad time for everyone.

A lot of people don't use mics, maybe some of them don't speak the same language as the others they are match made with (being a Texas, I get put up with a lot of Mexicans and Spanish speakers when I game), etc.

Raids require communication and commitment, and most players aren't willing to do either of those things in 2019.