It actually is the JFACC who will make that determination who gets what missions. The GCC will only weigh in in the very beginning when providing commander's intent in the planning process or when the components don't get along.
The COCOM is supposed to ask for capabilities, not specific platforms. They ask for 50 fighter/attack aircraft, not 30 USAF, 20 Navy and 10 Marine fighter/attack aircraft. JFCOM is the one who goes to the services and asks what is available then sources out the request. But when the COCOM asks for tankers there is only one place JFCOM can go, our boys with the scarves.
You have also proven my point, it is the COCOM that is in charge of the assets, not the services. The services are just force providers nowadays, the ultimate authority for ops in a COCOM is the four-star who is in charge. Meaning the KC-135/10's are going to tank whoever the hell he tells them too. It would also make any supposed service specific agreements moot, if they ever existed.
I think we are in agreement here that the Air Force needs to be involved in the EA mission. The Air Force needs to keep the capability......At the same time, what does a 2 star tell all his WSO's; sorry, we had to cancel the B-52 EA variant, so now your career is dead and you need to find employment elsewhere?.....Maj Gen Scott is the Requirement Director for the Air Force Staff, so his job is to be thinking about future acquisitions and keep those desires in the public view to effect future funding streams. Most Air Force leadership is generally in lock-step with the Service position when it comes to acquisition; the F-22 is a classic example of the Air Force directing all efforts towards one program. They are better than the Navy since they don't have three siblings known as Aviation, Surface and Subs all fighting for their piece of one pie.
I think the Air Force does need to be more involved in the EA mission, but they aren't and that is unlikely to change anytime soon. Whatever EWO's, not WSO's, had EA as their primary mission are a rare and dying breed in the USAF. In reality the only guys left who do it full time are B-52 EWO's. The other EWO's in the USAF are mainly ES guys, who fly very big planes and aren't EA oriented (there is a big difference, I did both). So it is not like there are a lot of guys who are going to be left without a career if the USAF doesn't get it's act together on EA. I bet less than a score, and they are nearing retirement.
So to argue that a tiny handful of guys who happen to do a PEP tour with the Navy VAQ squadrons is going to keep the USAF in the EA business is pretty laughable and belies the General's lack of knowledges.
The USAF's single-mindedness is as much of a detriment to them as it is a benefit. It is a bit like group-think, with many other critical warfare areas being left to atrophy. Why else would the USAF two-star in charge of the Joint ISR agency be a fighter pilot, three times in a row? Why not a RC-135 or U-2 type? Not many of those guys with stars on their shoulders. The only reason that some areas of the Air Force that are not part of the fighter-attack mission thrive is that they are not funded with service dollars but with big DOD money. The Navy is far from perfect, but there is a reason we still retain a robust EA capability while the world's premier Air Force has hardly any capability to speak of, either equipment or personnel.