GK1 is perfect as it is. Though I'd pay a LOT to see a revamped GK2 with normal graphics, not that piece of shit FMV crap. FMV was decline incarnate.
I would too.
To be honest, I'd rather they remade GK3 than GK2.
GK2, despite being an FMV game and having the inherent weaknesses of that subgenre, did pretty well with them. There was a comparatively lot to do (helped, I think, by dividing up the game between Gabriel and Grace, as well as providing a potential "real world" explanation for what is going on), there was at least one puzzle that was interesting (the sound mixing, even though there's a small problem with that). Comparing it to Phantasmagoria, it was clear Sierra had learned a lot about what worked and what didn't, and Jane Jensen is simply a better writer than Roberta Williams. I'd be kind of curious how that path could have gone if it had been nurtured in what Sierra used to be before the buyout (especially as we're basically getting FMV games nowadays, only with even less interactivity and graphical fidelity).
And I'll admit it: I like the campy, terrible 90s nature of the game. I like laughing at it and the barely-closeted "romance".
More pertinently, though, is what would/could happen with such a remake, and what would be gained. There's a risk that due to social pressures, the whole "gay subtext" thing would either be removed or played more overtly, even though it wouldn't make sense for the time in which it was set. There aren't a great many difficult puzzles in the game, and it's not likely that many would be added. The only thing would be "normal graphics", the quality of which people in this thread have commented about, mostly in the negative.
GK3, however, probably already suffered and could probably do with the most fixing. This is, remember, the game that the idiots in the mass gaming media held up as a poster boy to kill off the adventure genre. It was one of the games that suffered a lot because of the buyout of Sierra and the subsequent problems that happened after that. The game itself is quite buggy, and has pretty terrible clunky 3D graphics. Additionally, it would give Jane Jensen a chance to show how she would have made the game without the large cuts and impending dissolution of the company weighing it down.
Of course, we'd still have to deal with her bad luck with programming partners, but oh well.