What I just love about this logic is that a) it applies to all editions so singling out 4e is ridiculous and b) if it was named something more descriptive of the power like, for instance, Outline Foe, you'd claim 4e is bland and boring and lacks flavourful naming conventions for it's powers.
Well, for a, 4e is the only edition currently in production, so it is the only one that the designers can actually respond to criticism of in future products (which they seem to be doing, like I said above, I think the problem has gotten quite a bit less). 4e also has changed names of things that have had perfectly fine names for several editions now. You change Faerie Fire to Darkfire, and you are not making anything better (and Faerie Fire isn't even a particularly good name, like Rechan pointed out). 4e's new inventions also have very mockable names (the Penny Arcade dudes riffed on Shadowdark, for instance, and a casual browse through the Monster Manual will turn up quite a few). Even the things that 4e shepherded in from 3e tend to have some pretty dorky names (Dragonborn).
Those are all uniquely 4e's burden to bear, things that other editions can't hold a claim to.
So it is a problem that 4e has, that 4e has not changed, and that 4e carries on a deep level.
Again, not that they aren't getting better. But they didn't start getting better when someone was paid to change "Faerie" to "Dark."
For b, you're pretending to be an internet psychic, so I suppose in that respect, I'll do whatever you imagine me to be doing for the sake of your hypothetical fantasy, but I don't see how that's mostly relevant.
But, here's some names that I thought of while looking casually at the articles I linked to above, and thinking about them in the context of Drow, and how the power is supposed to be used:
"Elfshine"
"Spiderlight"
"Assassin's Guide"
"Drowmark"
"Pallid Glow"
"Victim's Halo"
"Lolth's Candle"
"Lolthlight"
I kind of like "Drowmark" and "Assassin's Guide" best out of those, since they both imply that whoever has this light on them is likely to die, which is kind of the point. I could see the first being used in-universe. "Beware the Drowmark, the violet light some call the Assassin's Guide. The dark elves place this on their victims before they strike, so if you see someone outlined in flickering purple light, ye best run and save yerself. The poor glowing sap's gonna be dead in a few seconds, and ye'll be next if they spot ya!"
Here are some others. The real world has done most of the work already. Slap "Lolth" in place of most of 'em, and use words like "light," and "glow," and "halo" instead of fire, and I bet you can come up with a few good ones yourself.
