toribash isnt meant to be realistic, would just be a feature which gives the toris a bit more look of a human.
would be crappy to texture them.
not needed, cause u can do everything with the actually hand - Grab an Punch , what you want more with a hand?
joints would be too little, couldnt hit them correctly while making a move in example. quick aikido? im actually pretty fast with making my moves, this would just mess it up.

absolutley not supported, cause just a feature for look and nothing which is needed.