The price tag is probably way less than a single helicopter shot in some movie budgets, so it seems like a steal to movie industry veterans who watch the demo reel.
Every segment of their demo reel seems to have been filmed with a drone/quadcopter. The fact that they can put a platform that powerful (REDs can do full remote zoom/focus/aperature/ISO/etc.) is impressive.
Just a note here. RED can't do remote focus, iris, zoom (FIZ). You need a remote follow focus with zoom and iris gears to do that, something like the Preston FIZ. In fact, RED doesn't even make one of these.
You are correct that you can adjust ASA, shutter speed, etc with the REDmote add on. Historically though, they are rather finicky pieces.
Every segment of their demo reel seems to have been filmed with a drone/quadcopter. The fact that they can put a platform that powerful (REDs can do full remote zoom/focus/aperature/ISO/etc.) is impressive.