I'm of the opinion that UAS AVO is a great option for post-first-tour NFOs. Flying pretty much any big UAS except the Preds requires a lot of aviation knowledge, but not so much stick-rudder skills....As an AVO I sat in a box and drove planes around by computer and radio, which is more or less exactly what I did as an E-2 guy. Pretty much the only justification for insisting on rated pilots as AVOs is to make the general public and FAA feel better about drones in controlled airspace.
I've seen some pointed criticism of the Predator/Reaper 'cockpit' setup and how labor-intensive is, apparently the opposite of the HOTAS concept.
Army doesn't require rated pilots...
A side effect of that is they are mowing lawns instead of training to 'fly' their aircraft, it sort of encapsulates big Army's attitude towards aviation in general.
One proposal that has been bandied about but not taken seriously yet is reintroducing Warrant Officers into the USAF to populate the UAV pilot ranks. I think it would be a great idea but I doubt it flies with our brethren in light blue.