"UAV" has stronger military connotations for me. I'm not sure it's inherently better. Maybe something entirely new is better? "AAV" Autonomous Ariel Vehicle, or something similar?
Or just UAS, since the UAM air taxis that are coming and are largely being lumped in with these deliveries aren’t very small at all.
For what it’s worth, at NASA the official term is (s)UAS, but we use that and UAV, drone, etc interchangeably has in day to day conversation. As long as it’s clear what you’re talking about, the exact word is really not that important.