It's just because Drows have tons of unique interactions.
For the game, this change makes sense. There is no reason to change it.
As for the drow "subraces", both choices have quite a few unique options.

I'm sure when they bring more races from underdark they will also be separated from the surface races.

Duergars are confirmed

Last edited by Rhobar121; 27/10/20 08:19 AM.