Pacnews don’t “want to change” anything. They are the defaults before Calamares makes changes to it. You can ignore the pacnew and remove it.
EDIT: I suppose udev.log_priority=3 should be changed to rd.udev.log_level=3, I already made that change myself quite a while ago.
EDIT 2: Oh, turns out we need to change loglevel=3 quiet to quiet loglevel=3 for it to actually work. I’ll fix that here shortly.