Greater Export features - Export to .avi (A lot of other software includes such features and is extremely useful when building flash animation and joining to video)

This is by far the most important feature. The ability to export to a format that is best suited for the user. For example a user like me creates movies. He likes to create some dazzling flash effects - which he does with his trusty flash software. Now to turn that flash into video he needs to (a) export to a video file (that automatically builds .swf into streaming video file) or (b) has to convert or (c) has to record. It is easier to export into a desired file ;-)