I don't think we will see those issues, after Fallout3 they hired a new head of QA and I'm sure they have staffed-up.
If anything, the New Vegas experience would be enough to push BGS to improve QA even more, considering that Vegas didn't win the kinds of accolades that Fallout3 did, largely due to the bugs. I mean OB and Fo3 had bugs, but most of the initial reviews of New Vegas were filled with slams about them - and I think this hurt the game in the ratings last year.
If nothing else, Vegas was a lesson that Yes, bugs can hurt the franchise. Good incentive if you ask me.