That’s because when they say that flawless MM is going to activate at Sunday reset, what they effectively did is “activate” flawless MM. Over the coming weeks you’ll see more and more players just not play on Friday and Saturday because they want the easy games during the flawless MM. This effectively makes (or will make) Friday and Saturday a flawless matchmaking pool. That’s why if they were going to do something like this, they should’ve never specified when the flawless MM gets turned on (and the exact time shouldn’t stay consistent) that way neither side could abuse that.