Hmm, well this is odd. I have the Steam version of the game (downloaded using non-Australian servers, since it wasn't available on them at the time) and I appear to have the uncensored version. I haven't tested the Succubus, but I was able to accept sex, and see the cutscene, from the elf woman I rescued from the fire in Act 2.
Maybe I was just lucky to be fast enough to grab this version? Or is it a loophole to download the game from, say, a US or Japan server (which is what I used)?
Yeah, I got my version through Steam and I was able to have sex with the elven woman I saved, and the succubus. Not sure why my version wasn't censored - but then after seeing how little it affects the story I'm not sure why the ACB got all worked up to begin with... You get to see more of Triss in the pool...