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Not for me, I stay away from this concept too hard to manage for my understanding... and patience
Drum yes, but only as an agitation method, I am sold to roasting done by true 100% convection (hot air), with optional recirculation.
Far IR could also be an option, even if not so well understood.

Actually, I find your idea of an upsized Nesco very interesting, I mean the Archimede screw based auger.
It could be actuated by a windshield wiper motor placed on the hot air exit cover of the RC.
Same cover could have a lateral pipe exit, routing the hot air to a small cyclone like the aluminium dust commander some of us already using, so chaff capture solved as well.
The requirements for hot air blower and heater power will decrease a lot, maybe even halve... noise also as well, making possible hearing FC, what are drawbacks ?