Completely agree about that Falco Scheffler video, it's great - https://www.youtube.com/watch?feature=player_detailpage&v=_C... appears to show him with more than 2 hands! [He does do 5 balls at one point though.]

I think the benefit of less balls is that one can actually follow the patterns whilst with more balls/clubs/objects it's all a bit of a blur and one is respecting the skill but not really getting much out of the visual appearance. Like listening to music written/performed for the listener versus written/performed as a technical demonstration of the skill of the musician.