strange question.
Larian has to my knowledge never released expansions, and the "DLC" has been extremely minimal (like ser lora)
Then again, WOTC is a big company and expansions have been one of the core strategy of older DnD games.
Hard to say.
I guess i mostly want more. New character options would certainly be nice since i tend to replay these types of games, but my taste in characters has a tendency to be narrow, so the more options we got, the higher the chance i can vary up my characters without it annoying me