So, in terms of a DLC, I would actually much rather they polish the game as it is. Because some major points in Act 3 are rough, to say the least. Minor Act 3 spoilers:
Not least of all the good Durge quest culmination, which feels empty. Almost no companion reactions.
And I don’t think that they will do a DLC, because I’m sure they understand that the game as is needs polish. Folks can say that it’s not either/or, and that’s technically true. But I doubt that the resources/energy exist to do both.