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.
It won’t bring the kind of devastation a BUFF will bring. But using precision type weapons, it would bring a big suprise from up high.