Dragonbird's dark mode mod is a very small and simple thing and has never given me any trouble, though. I played through the game in dark mode many times, and pretty much always with the mod because the visual/sound effect annoyed the crap out of me.
Anyway, I hope the devs are aware a lot of people hated the dark mode effects, and there won't be any gear with obnoxious visual and sound effects in TW3. I really hate this sort of thing. There's a shield in Dark Souls 2 that makes a bell noise every time you block an attack, and I won't use it just because that's so annoying. It actually has the perfect stats for one of my builds, but I can't deal with it.
While we're at it, I've said it before, but I really hope the three dark sets are available in TW3 somehow if you transfer a save where you had them. I really, really, really like the Blasphemer set.