One thing I liked about taking the OB through the mountains was the fact that I didn't need to downshift.
Notice how many more Subarus, new and old, you see when you're in the mountains? I-68 was full of them in Maryland.
If I lived there, and dealt with those long grades all the time, I'd seriously consider building some kind of dive-brake mod. As it was, last time I came north on I-77 through WV, I was pulling passing maneuvers at 80+ mph, in neutral.