Full rudder travel; I agree to a small extent you have a point here. However if the student is on the habit of not knowing that they have full rudder travel it's very likely that in the heat of the momemt, if they were to encounter Vmc, they would not apply full rudder travel anyway.
This comment, to me reinforces the need to demonstrate acutal maneuvers. Pilots must be in the habit of instinctively and appropriately using all of the control available to them. That's why the designer put it there! I can recall many times over the years flying, where an abnormal event during the flight required full and held control input. If a pilot is unaware, or reluctant to apply full control as required, that is a problem in itself, letting alone Vmca.
An aspect of this is that with many aircraft, the full deflection of one control will require considerable application of others. The biproduct of all of this control, can be a whole bunch of drag.
So if the pilot is learning the full control available, and the occasion to apply it, the sensation of increased drag resulting, and the need to co-ordinate all of this control, that is a realistic lesson. I cannot be simulated with partial conditions.
It is not making the most of the efforts of certification test flying, if the characteristics which have been shown compliant for a pilot of average skill, attention and strength, if students are not being shown what the aircraft will do. Obviously, there are all kinds of safety mitigations which are wise, certainly including a briefing, but the plane is meant to be flown. If not, it will not pass certification, or could have a caution/warning note in the flight manual if something is marginal.
For pilots who might be flying King Air B200's, are you aware of a special certification condition (23-47-CE5), which describes that the aircraft can reach yaw angles approaching 40 degrees with full pedal deflection? I was required to demonstrate this during test flying for a survey boom installaion. It sounds scary, but was really quite benign. Though I was accompanied by a company pilot (who had not done this either), I had never before flown a King Air. This was no problem, when approached with caution.
I think it unwise to insulate new pilots form these experiences, when they can be demonstrated with safety.