Yeah, I was sad to see the YF-23 lose the contest, I'd liked it a lot better. It looks less conventional... but damn... it looks sexy and intimidating too!
There were reportedly some issues with its approach for weapons carriage in its internal bays. But perhaps those could be worked out.
I would think an "FB-23" with enhanced range (drop tanks perhaps?) could be very handy. Supercruise with a relatively stealthy fighter could really surprise the hell out enemies, without needing stuff in the air as diplomacy is still pursued.