Alright, I'll try to respond point-by-point, but I apologize if I miss anything:
- I will most definitely try to make Veidt more of an ambiguous, less straightforwardly-evil character. Several friends of mine who hadn't read Watchmen that I saw the movie with instantly asked me if he was the bad guy when Dan visits him in his office. I'd like to change that fact.
- I haven't seen Under the Hood, and I'm not convinced that inserting portions of it into the film will help the film in any way. Sure, it may bring it slightly closer to the graphic novel, but if that comes at the expense of the film's ability to stand on its own, then I won't do it. I'll reserve judgment on this issue until I've seen Under the Hood (which likely won't be until the Ultimate Cut comes out).
- I've seen (most of) the motion comic, and I agree that the score is good. If I can find a way to use portions of it, I certainly will, but I wouldn't hold my breath for that one unless a soundtrack album is released.