You had convincing arguments right up until this line. AmigaVision has very little animation capabilities it only plays back existing anims and anim brushes. Scala is also just a presentation engine like AmigaVision only better. You still need DPaint in addition to those two tools to do animation.
Yes I understand that. But the original Poster was asking about MovieSetter compared to Disney's Animation Studio. From what I understand, MovieSetter is only an application to string together animations made in other applications (like DPAINT or Disney) into a larger film, and sequence sounds and music along with it. Sort of like a timeline video editor (vaguely). MovieSetter has no animation creation function (as far as I understand).
In addition to its animation drawing capability (Pencil Test), Disney Animation Studio also has this sort of "timeline" editor thing, allowing one to assemble larger movies from animation clips and sounds.
So I was trying to say that if he wants to do such a thing (assemble movies from animated scenes and sounds) he might want to check AmigaVision or Scala, which can do exactly that (assemble multimedia together into a presentation). MovieSetter has a good reputation, but I believe SCALA was updated for many years after MovieSetter became abandonware.
Of course, like you said (and I originally intended), the actual animations would have to be created in some other application like DPaint, Brilliance, or Disney's Pencil Test utility.