Not to get all Debbie Downer on this but this does seem like something that rips right into the internal guts of the program.
So def take your time on this if that is the case and test the frack out of it.
But yeah... ultra cool and the upshot, if it is indeed digging into the heart of the code, will be I bet they can find and patch a bunch of other crap along the way and open new avenues for future goodies.
They did mention how as they hack and patch they leave big open doors for themselves to add stuff that were previously impossible.
So maybe I'm actually being a Patty Positive with a dash of Carla Cautious.
Man... I need a date.