An interesting and ongoing debate, in the middle of this reorganization:
I think this will make it even harder to trust the NSA. In my book Data and Goliath, I recommended separating the attack and defense missions of the NSA even further, breaking up the agency. (I also wrote about that idea here.)
And missing in their reorg is how US CyberCommmand's offensive and defensive capabilities relate to the NSA's. That seems pretty important, too.