I can say the same for it hurting PC. Casual/Competitive change decimated my friends list. I had 10 people that regularly played, after the Casual/Competitive was added they ALL left. This in turn caused me to leave, I probably was going to anyways because I want to select my mode. I have returned since the reverted the MM, but only 4 of my friends have returned, the others have moved to other games in the week of no BB, so the damage is still being felt.
I have never waited longer than 10 minutes for any game with the mode select MM. So I personally feel like it was a terrible decision that hurt the player base more than it helped. I understand wanting to try things to help, but they shouldnt just throw it out there. Maybe have a test server for new things, but even that would have issues because of so few players on PC.
Bottom line is they have a mess on their hands and I sure don’t envy them.
Info:
PC player
Central time zone
Character rank 80 something
75% or so win percentage