Ignoring Duskwights is a huge mistake, imo. Deep forests and underground caves sound like a fun setting for at least a good chunk of an expansion, even. Duskwights are already basically Drow, in-universe racism and prejudice against them included - and they tend to be portrayed as evil-, why not lean into it? Make an Underdark-like area with bioluminescent plants and animals or something. Yes, I'm biased. What about it?