I think throttle chop is VERY important.
1. It shows the student how quickly RRPM decays so there is none of this practice engine failure go, put collective down etc etc. in a relaxed mode
2. Also shows in a piston why you have to put in a boot of pedal and how quickly the nose drops in all helis as you put collective down ( think disc loading etc etc )
3. Also will demonstrate why where one can ones doesn't turn down wind on take off until passing through about 350 ft. (Yes I know you can do what you want but trying to teach best practice )
As for landing on snow, very impressed would suggest that there were some markers on ground or was using the person to judge height above ground !