I think this is a really GOOD idea. I apologize for the negativity, try to ignore those posts. I suppose since the WiiU itself is hacked, perhaps a map could be edited to include (or perhaps just be) a payload, which could then be transferred to the Switch (as you said, you have ALREADY successfully transferred a save, it is just crashing the Switch if I understand correctly?). That is exactly how Ninjhax, OOTHax, BaseHax, and pretty much all the other ...Hax worked on 3DS, it is not a stretch to think something similar could be done on the Switch.