I don't know if this has been mentioned already, but:
I'd like to have a more functional footage viewer. Right now there is no way to play back image sequences in realtime without RAM previewing them, and the movie viewer that lets you view movies ignores interpretation settings like alpha, pixel aspect ratio, and pulldown removal. This means to view movies as interpreted by AE I have to drop the movies in a comp and do a RAM preview, which is a pain.