Regarding a shorter rig, isn't it best to go with a higher aspect ratio? IIRC, tip losses start to kill the efficiency of shorter low aspect rigs.

Regarding the jib, I think AC72 guys had it mostly for maneuvering. Even with near zero camber they generated too much drag at high speed. This boat isn't in that speed realm yet (add foils?) but watching the video they didn't look like they needed any more pressure up front.