Isn't Crytek in a good position to get back in front of the leak through version control? Can't they add tighter and/or different controls to the official release and then only update those copies? Going further, can't they value-add to the legitimate version to encourage purchase once the illegitimate version becomes obselete? The fact that people will pay 10, 20, 100% more for limited editions of games with extra guns or plastic figurines would suggest that offering a kick-a$$ online map not available to Crisis 2 version 1.0 users would be a successful strategy to get the downloaders onside.
That's assuming of course the company hasn't flown off the handle and called them too many names - which is great to see hasn't happened yet.
Of course, perhaps none of that is possible; I don't know the details of what was 'released'.