Multiple (more than 2) audio/sub tracks is my first complain with pretty much every gui out there (excluding the old dvd2ogm and dvd::rip). I would often like to rip the original soundtrack, the comments, the track in english or my native language, and maybe french since I'm trying to study it. From what I understand, it's mainly a gui problem since I can include as many tracks I want in mp4 or mkv, right?
For the psp it would be useful to be able to choose the sampling rate for the audio (psp only supports 48000Hz). Automatic running of atomchanger would be very useful as well