Well that is very Forgotten Realms/D&D sounding due to the spiders, slaves, dislike of the sun and underground.
Dark elves in most versions of fantasy settings are generally assholes so them having slaves is fine. Even in Elder Scrolls they had slaves.
Underground dwelling and dislike of the sun is eh. There's a lot of fantasy races like with similar traits so it's not really a big deal to have them like that, but it means you have to distance yourself even more from their obvious inspiration. Which leads to...
Spider worship. I'd get rid of this one entirely because with the other two traits in place, now they really are just FR drow with the serial numbers filed off. Having them worshipping some eldritch horror would be a perfectly fine substitute what with them living underground being evil and all.
And they sound pretty matriarchical if they got a queen and priestesses running the place. A better way to change that without completely reverse mirroring it would be having an oligarchy running the city and all the council members scheming against each other for various reasons. Scheming and backstabbing are pretty dark elfish without it being specifically linked to FR.
At first I thought she was asking if it would be a fanfiction of Eternal. :p
I would agree with End that while some of these things are pretty generic and not tied to the classic D&D portrayal of drow, combining literally all of them (especially the spider goddess, because you can make up another entity for them to worship pretty easily) gets into the realm of D&D. I would also recommend trying to stay away from the generic stereotypes in general, as it would be more interesting to read something where dark elves are unique, rather than a copy-paste from D&D.
Always found it sort of odd that in dark elves in FR lived underground for centuries are dark skinned. Surely they would become really pale with no exposure to the sun.
That's the main reason why I didn't have them living underground in Eternal. Makes more sense for them to have dark skin if they're exposed to the sun. (Even more so when they've been living like nomadic mercs for some of their existence.)
Plot twist: they're just ruled by Shelob. It's actually a LotR fanfic, not at all related to D&D.
Dont forget they must be lead by their untrustworthy acquaintance, Seagull.