The dlc question is more of wanting to know the knowledge about the possibility of doing that, rather than actually playing them.
Sure, sigpatches are trivial really. I just would like to know more info about them.
Coming from the 3DS scene, I avoided CIA installations and purely used roms simply because each installation is associated with a fake ticket written to ticket.db with a zeroed out console ID. While removing the ticket is simple, tickets in ticket.db is permenant, and can't be removed. I, and a lot others, hated that.
I would assume the wiiu uses the same kind of structure (maybe
@FIX94 can confirm this). On the 3ds, the only 2 ways to get back a clean ticket.db is to either dump a clean ticket.db before any installations are done, and inject that back whenever you would like the clean one back (formatting doesn't clean the db), or to restore an earlier Clean NAND dump from before any modifications were done.
As for the dlc on the 3ds, you actually are able to use your ticket to unlock all dlc, but every time you access the eshop, the unpaid portion is removed from the system.
Now knowing all of the above, it should be clear why I asked about a NAND dumper, and how dlc works if not using a fake ticket, but instead using your own ticket with a partially owned dlc