The US army is mad keen on them. The USAF wants rid of them because it doesn't want to do the job they're designed for, & the army wants them to do. The evaluation as 'not operationally suitable' means they don't do the job the USAF wants to do, & ignores the fact that the US army (i.e. the consumer of the service the aircraft would provide) is crying out for them, because it wants a different job done.
Australia has the good fortune to have an air force which is more responsive to the needs of the military as a whole.
Juris praecepta sunt haec: honeste vivere, alterum non laedere, suum cuique tribuere.