I heard an interesting take: that CDPR knew that this would happen, but had to choose between "missing the holidays" and "launching even though it's broken" and decided the latter was just less of a problem.
IMO they should have just delayed the last-gen consoles. Would have sucked, but that would have avoided most of the backlash for another delay as well as that for the buggy console release.
Skyrim still has plenty of content-related bugs (i.e. not graphical or performance related); Bethesda never fixed them but oddly enough, modders did and you can download a bugfix mod from Nexus or Steam.