FWIW- I now have five (5) models setup with the new 635 rx set at default in all of em -
all five are different in size and wing loading - they weigh from 5.5 pounds ( Splendor) to 12 ounces ( Zoom3)

ANY IMAC/ Pattern or simply silly maneuver can be done with no fighting from the "gyros" which are simply looking at last attitude and trying to maintain it till stick commands counter em.
Those who have not flown this setup typically have a misunderstanding of what it is actually doing.
Snaps- spins all work as before BUT recovery is better !
here are pics of models I have been flying with the system -as well as the VisionAire and yet unflown Splendor.
Could I fly any of em without the 635 - sure - but having flown with the setups I am hooked - the system adds that little bit of extra stability which help my lousy eysight see exactly what's up (or down).
I flew Pattern -IMAC and Quicky for years but a screwed up eye problem really made things difficult - this system is terrific