I have a lot of issues with a sub race of elf in black face that by default are run by a matriarchy of evil women, but as far as the actual powers? Superior darkvision is right up there, but faerie fire and darkness can also be powerful, even if they are only once per long rest.In principle I agree with this, but in practice, what super powerful innate bonus is sunlight sensitivity canceling out for drow? Their innate spellcasting is on par with Tieflings’ Infernal Heritage. Their weapon proficiencies are useless to any class that wants to be using them. And the rest of their abilities are shared with the core elf race. The only thing I can see sunlight sensitivity really balancing out is superior Darkvision. And fair enough, that seems like a perfectly reasonable tradeoff. But by the same token, if a player wants to play a drow with regular old 60 ft. Darkvision and no sunlight sensitivity, that seems fine to me.
I also ban them as a race for other reasons, but that conversation never leads anywhere constructive.