do you think they flew on full auto-piloting, not applying anything from themselves,
They probably flew in a simple AP mode, entering just rate of descent and heading.
(VM - vertical mode, HM - horizontal mode.) And AT (auto-throttle) of course.
During the MAK presentation they said VM was set to 4m/s, then changed to 8m/s.
So they "did nothing" in terms of touching main controls (yoke, throttle, pedals)
but they were flying "with their thumb", just turning the knobs on the AP.
At 60-50m they could heve entered the 0m/s to level off and "scud run" to the threshold.
This is very probable.
Until they saw the ground and trees and pulled the horn and firewalled the throttle.
This automatically disconnected the AP in all 3 modes.
These were the signals.
Could they have possibly "fed" the previous route to runway from Far Beacon, into their mysterious system (after re-wamp, a hybrid of Russian and Western things), from the flight on the 7th of May, and simply, may be, activated it?
No, I don't think so.
This is not so easy.
You can enter the route to the FMS, and it gives then "orders" to the
original AP, but in this case I am pretty sure, it was impossible,
and they did it in a different way.
Unfortunately.