1. The patch dropped on Friday. It's Monday. There have been 2 full days, both weekend. What exactly are you expecting? The devs are entitled to have weekends too. (Note: At least some parts of the U.S. (which I don't think is enitrely relevant to Larian) Presidents day is observed today, so at least for me it's a 3 day weekend of broken bg3)
2. Yes, dropping a patch on Friday is extremely stupid because if anything goes wrong (which you should assume it will) you either have to cancel the weekend for employees (not good) or expect players to deal with the game being broken over a weekend (and many are too entitled to take that well.).
I'm rather curious if it was supposed to release ON v-day, which would at least have only been Wednesday, but got pushed back because it was even more broken then... and they promised v-day week, so couldn't delay any more... because, again, many modern players are very entitled and there would have been a s***storm then too.