It is encouraging that the ACS calls for acceleration in ground effect to Vx or Vy as appropriate on the soft field takeoff. Here is recognition that there is actually greater acceleration potential in ground effect. Why that free ground effect energy is not also recommend for normal and especially short field takeoff is beyond comprehension. Nothing soured me more on the old PTS than being test situation forced to roll on the ground down so much runway that could be accelerated over so much more efficiently in low ground effect. And even worse was pitching up to a Vx pitch attitude long, long, long, long, before necessary. This resulted in hanging on the prop in a max gross or often over gross C-150s where engine failure would almost certainly result in stall...in the Midwest. In Flagstaff it would result in the airplane mushing back onto the runway. At least the poor student, and instructor, couldn't get high enough to hurt themselves.
So what did we do? Of course we worked around this dangerous techniques.
Vy on normal takeoff (+10 knots allowed) perhaps survivable.
Vx or Vy as appropriate on soft field (+10 knots allowed). This was always the best soft field (and the best actual non-test short field and normal takeoff) as long as we used dynamic proactive elevator to nail level in low ground effect.
Vx on short field +10 knots.
Hopefully DMMS, Defined Minimum Maneuvering Speed, will become normal after hanging on the prop initially.
All stabilized approach airspeed can be 1.3 Vso-5 knots. Deceleration on short final, absolutely necessary on true short field, isn't going to happen. The best instructors can do is cheat some power remaining in an early round out and hold off.
I strongly question how the short field approach can touch down within 200' PA.IV.F.S10, using the exact same 1.3 Vso approach airspeed as the normal approach which can touch down within 400' PA.IV.B.S10.
Does the throttle have to be closed, rejecting it as the effective descent stabilization control, to pass the flight test?
Will the fact that upset, loss of control, and controlled flight into terrain is killing as many pilots as ever trigger more than just adding some good terminology like ground effect and energy management to the flight test? I don't know. But until safe maneuvering flight techniques are actually taught students, until low altitude orientation is accepted along with high altitude orientation, LOC, upset, and CFIT will continue to kill as many pilots each year.