Just throwing this out there. The game itself is 3.6 right? The patch enables a 3.6 game to play on a non 3.6 firmware right?
The game disc itself can not be edited for a bluray disc is read only right? The patch is in the system giving access to a 3.6 disc to 3.55 firmware right?
Well from what I understand from basic security one window opens the entire house is robbed. Sony just opened a window, regardless of what SDK they used they bridged the gap between 3.55 and 3.6. There is something special in this patch...something that can be repeated. In all honesty they negated their own security on this one, let us learn from their trespass, wash, rinse, and repeat. Not CFW but could solve the need for one.
Just some ideas, it may have been already said, but if a non-dev can see a hole in the process then someone has got to be able to exploit it. I really hope someone is already ahead of me on this, if not oh well. Life goes on.