You aint seen nothing yet. The GH is a good recon platform and probably be modded to carry weapons. But its expensive, flys high and slow so its probably not a good platform. Its long flight duration makes it a valuable asset for what it does best. IMHO, the next generation of UCAVs will be able to take a fight to an enemy, be cheaper to deploy and be able to overwhelm an enimies defenses. They’re almost scary.
After I had sent you that response, it dawned on me the mission the Global Hawk is tasked with. As you state, it’s not a good candidate for your run of the mill mission sortie or whatever you want to call it.
I can see some types of missions down the road for this. If you had a fleet of them, you probably wouldn’t need the B-52 fleet any longer. Perhaps I am a little overly optimistic though.