I agree. It could do with SOME extras, but the remastered animation and sound makes up for it.
Interesting to note--the movies play up the Newtype aspect much more than in the TV show. In the TV show, the concept of Newtypes isn't really introduced until the last 6 or 7 episodes, while in the movies, they already introduce it in the 1st movie, and really go in-depth in the second.
Movie three is a nice surprise with oodles of nice new animation. Yasuhiko was really getting into his artistic groove here.