The pilot (Wings Standards) QS is broad and some elements could be tailored/reduced to account for a UA Pilot occupation however, I would argue that all aspects of the QS are still relevant to all CAF pilots (Plan, Pre/Post Flight, Ground Handing, Take off, Landing, Clearhood, Formation, Nav, IFR, Composite, Emergencies are the POs. Not sure what could be changed). Formation/Clearhood/Composite are probably not required for UAS. But the same could be said for other sub-specialty (when is the last time a Gonzo flew formation and do they have a currency requirement?). Having a broad QS however allows for cross employment between platforms without having to re-do the whole training (what I have seen often is advancing based on proficiency rather than a set number of training hours when people transfer from one specialty to another)
The ACSO QS is missing critical items (the flying parts - Takeoff, Landing, IFR flying are the critical ones - IFR is shoe horned into Navigation but there is no IFR tickets for ACSOs). Until the ACSO QS - the standard to achieve Wings - is tailored to meet foreign airworthiness requirements, that’s a non-starter. There is no point in investing time, effort and money when you won’t be allowed to use the resources you train.
The only viable option, at the moment, is using pilots. UA Pilot could be a fourth specialty (after jets, multi and helo) of the pilot occupation or even its own occupation, using the Pilot QS as a starting point. Not sure how we could easily converge the ACSO and pilot occupations in the short/medium term given the differences in tasks (which is where the skeleton of a QS would start). I could see the pilot occupation taking on ACSO tasks but not the other way around. Given the health of the pilot trade however, this is highly unlikely…