I'm going to leave aside the fact that Larian is implying that there is a connection between Subrace (what an individual is from birth and cannot ever cease to be) and who they worship (which is but one of many cultural aspects and can change through an individual's life).
I dont really think this is matter of worshipping ...
More like who claims your soul after you die ...
I mean if i remember ingame description corectly, it says that their Red eyes are mark from Lolth that she will claim them.
Wich seems significant enough to me. :-/
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Also ...
While i perfectly understand compulsive obsession with sorting things your own way ... it was main (and often only) reason for all my hotbar feedback.
I dont really think that having them separated makes Drow any less elvish. O_o
