I should say, fun cameos for some characters I don't consider bad. Some characters are more deeply written than others. I think you could get away with a "Wink wink nudge nudge oh look it's Jan Jansen! Or Mazzy Fentan!" or something like that.
Other characters, however, are clearly more important and need to have more thought given to their inclusion. Viconia, I think, is a nuanced enough character, with a fantastic enough romantic arc, that her appearance should have been more thoughtful. Maybe I'm biased, because she is by far my favorite romance in the originals (And not just because she's an edgy sexy drow lady, though that helps).
But Viconia is such a tragic character, in my view; born into the heart of evil, into a privileged position there, and even then still having an attack of conscience. And her reward for her conscience is to be persecuted, to be hunted down arbitrarily on the surface. And the only character who treats her with any decency is you, and just being shown a bit of kindness is enough to get her on the path to abandoning evil. In a way Viconia can be read as a character with an innately good nature, struggling against the fact that she grew up in, was brainwashed into, one of the most dehumanizing, sadistic, cruel societies imaginable. And this appearance could have shown that tragically, there is no happy end for her. That absent the redemption path in BG2, she wasn't going to find redemption on her own. She couldn't do it all alone, and in service to Shar the sense of injustice she once had would slowly be chipped away, forgotten, erased from her, even as she erased Shadowheart's identity. Her potential fate in the original games could really make you *feel* what a sadistic monster Lolth was. I feel like if she was written better in BG3, it could have made you feel the depths of Shar's evil.
I don't know, again maybe I'm biased. I just feel like she deserved more.
