If NASA is smart, they’ll use both Falcon and EELVs for crew transport, so they have redundancy. What the Air Force really needs is a NASA to not develop a new Shuttle-derived vehicle, which it doesn’t need, and doesn’t have the budget for, but Congress is insisting that it build anyway, for no reason other than job preservation in Alabama, Utah, Mississippi and Florida.
Yes, the government is a big money waster, no doubt about it. But I like the idea of using the big external tank for other things besides just ditching it into the ocean after it has finished thrusting a payload into space. With the continuation of the shuttle based system, this may be at least a theoretical possibility. Not that something similiar can't be done in another way, though.