My theory is that 90% of the hacks out there are made through cheat engine, and affect the game files themselves. If the game files were not changed, and you bypass XIGNCODE, then wouldn't this render all of the previous hacks working again?
The only problem I see is that when my game updated, I saw it updating the Prison Break maps. This may have changed how boxes were awarded, and how a room is created. This may void the room hacks, box adders, and maybe even the euro and EXP hacks, which is 80% of the hacks out there right now.