Seems like the beta testers did their job, so I wonder who didn't do their job in fixing/investigating what the beta testers reported.
Bugs that slip through a beta are fine, bugs that were reported during the beta and still exist in the final product? So what was the point of the beta test to begin with?
They have their very comprehensive list of things that do and don't need to be fixed. Some of them are going to take time to fix, and since the whole Expansion is fully integrated into the Skyrim base game, the first wave of fixes should start appearing with the next patch.
But that's my internal timeline. Please don't assume that I have an inside line to Bethesda, because I do not.