The biggest problem with JFCOM is that they employ (or more aptly "pay") a metric ass-ton of contractors. A whole lot of people will be losing their jobs if/when this happens.
For the Joint Staff this means they will have to deal with all the Global Force Managment issues that JFCOM presently runs, as well as pick-up a whole lot more of the Joint Doctrine development process.
On the good side, there won't be anymore "another great JFCOM idea being shoved down our throats"!!
Virginia lost one carrier already (GW to Japan), they are getting ready to lose another in a few years (to Mayport) and now they are losing a huge staff command.... Not a good time to be a Virginia imcumbant!