Like just about everything google has done since android 8, they are terrible. 8 tiles used to take up a fifth of my phone's screen and would leave plenty of space for notifications, now they fill up the entire screen with their ridiculous padding.
I really do wish there was an option to set a custom scaling to the quick settings tiles.
I feel like maybe I'm an outsider with this opinion, but I never liked the Material You UI at all. While it's nice having a few extra theming options available, I feel like it just makes such poor use of the screen space.