Personally I don't like being restricted to either Lolth sworn or Seldarine Drow. The Drow character I want to play is absolutely not Lolth sworn, but he is far from being a nice guy, not to say following one of the Seldarine. The Drow tagged dialogue choices don't always offer such a direction and are usually either full Lolth sworn or decidedly "I'm not like them" respectively. I hope that this will become a little more nuanced until full release, but when in doubt there's always multi-player where I can role play my character the way I want towards the other 3 players at least.
Seldarine Drow have several non-Seldarine god options including evil gods like Bane available to them as clerics.
In this case, "Seldarine Drow" just means "drow that aren't connected to Lloth".
I do wish Vhaerun was an option...granted I'd never play an evil character (I just don't find it fun) but would be nice for other people to have the option.