-albino drider castes;
-remove most of the drow items and replace them with vanilla ones;
-add a smaller version of the two-handed sword usable by drow and dwarves;
-see if drow still have trouble expanding, and fix it;
-make trolls never appear in drow civs.
albino driders ? Interesting...
There are a lot of drow weapons that I've never used, either from Rhenaya's original.
What I've thought of though, is something that I've done in my own modding efforts - split entities into different groups based on biomes, and allocate some, but not all, of the items to them. Like... I made the human civ into 3 civs, and changed their biomes, so you'd get a temperate human civ, a tropical one etc. And then restricted human turbans and scimitars to the tropical one, for example. So that there'd be variation in the kinds of human civs that you'd encounter.
Perhaps something similar could be done there. Split the drow entity into biome variants, and give some weapons to one drow civ, different weapons to another.
The expansion thing, I thought was solved ? it was to do with their biome preferences ? Unfortunately, subterranean preferences don't work too well, so what I did in my own changes, was to change their biome prefs to those of dwarfs, and then the drow civs would endure and expand. Possibly not ideally fitting with the lore, but it does at least work with the current mechanics.
Trolls, yeah. I've not been able to understand yet, how the animal restrictions work, and how to stop e.g. goblins from having drow lizards. So sorting that out would be good.