The problem is with the fractures going one way. In Toribash there is naturally only one directipm a joint moves. It moves on a plane. Mods can change the plane they work on, so they'd have to add an extra set of movements for that to work and would just make the game more complicated and harder to play.
Also we've had the 4 player games in 3.0, no one has made that again, but probably because the code for the fame has changed so much. Perhaps if enough people ask for it they may do it again. I certainly would lilebto see it again.