BG2:EE when released was buggier than vanilla.
Depends. Modded vanilla, or patched vanilla?
BG2Fixpack - which is a mod - fixes about several thousands of bugs. People seem to forget just how buggy the vanilla game is.
They had to rewrite the code somewhat to make it work on mobile devices, and that apparently caused at least some of those. That's no excuse, of course, but at least I can understand why it is the way it is.
I have not played it after the BG:EE fiasco, so I can't really comment on the matter.
I find it pretty hilarious and sad, however, that people are calling their work cash grabs and still fault them for not patching fast enough in the same sentence. The very definition of a cash grab suggests that very little effort went into the project in order to make quick money. How you can say that about a company that still supports their products 2 years after release when it no longer affects the sales all that much baffles me. You can blame them for doing a poor job (and that would be true), for being talentless and whatnot, but from what I've seen, a lot of effort went into the games. They really wanted to make their BG editions the definitive ones, they just went way over their heads and failed horribly at it.
They are slowly getting there, though.