Mercurius
Legend
Charlaquin has expressed an issue with the idea of drow being "an inherently evil race," which I don't think is true. I'm not talking about the issue of subraces, which is kind of separate, if adjacent.As I understand it, I think their problem is that drow are already a subrace of elves, so these other drow are just new elven subraces arbitrarily being called drow with the "real" drow being unchanged.
Of course, 5E has been kind of all over the place with the race mechanics in the last year or so. You've got the original stats for different races, new subraces, alternative stats for some races, the customization rules from Tasha's, and lineages in Van Richten's Guide that effectively can serve as either a race on their own or as a modifier to an existing race. It's possible that they could decide to make a new drow race that has udadrow as just one of several subrace options, or lineage options, or whatever.
As for the new variants on drow, ultimately I don't care all that much, but it does seem like WotC is kind of flailing about races in general, and not doing a very good job of it. I'll reserve judgement until I see more, but just the names are pretty lame. I think, also, the end result will be that of dilution, that the word "drow" will end up being kind of meaningless. Drow are a specific offshoot of elves from the Greyhawk setting that have been made core; maybe part of the issue is just that: why not keep classic drow in Greyhawk, and then offer setting-specific variations on the archetype of "dark elf" (ala Dragonlance, where there are no drow and "dark elf" means something different)?
If I had a line to the WotC designers, I'd suggest simplifying core races and then offering setting-specific variants as examples of how DMs can vary them (e.g. FR's sun and moon elves, the "-nestis" of Dragonlance, etc). Meaning, keep the variants to the specific worlds. DMs can use them at their discretion, use the variations of the world they're running, or make their own.