I've always advocated, but never been given the time, that students should learn to fly the basic a/c.
Amen to that. Engine failure at V1 and go is always a tricky manoeuvre for the first time during type ratings. I have seen students spooked by the FD dancing needles. The instructor, if he has the courage,
and the skill should be able to hop into the seat and do a flawless demonstration without the flight director to help him. That gives the student an ideal to aim for and increase his confidence. A picture is a worth a thousand words, comes to mind.