- Departure stalls: Yes, a JAA requirement
- High-speed stalls, for instance done in full-power, very steep (75 degrees or more) steep turns, to show that, indeed, an aircraft can stall at any speed and any attitude. (You might also want to include ballistic flight, stall turns and wingovers to show that an aircraft can also fly - briefly - below Vs.) - Sort of covered under JAA. Certainly the increased wing loading bit is a requirement.
- Recovery from almost-Vne dives (at least well above Vno) - Good idea. Probably could be covered as part of the spiral dive scenario.
- Recovery from upset situations, for instance from inverted flight Yes. Normally covered from Ex6 onwards although I don't think the majority would experience inverted flight (aircraft limitations).
- In-flight engine restarts (plus you'll find how hard it actually is to stop a fixed-pitch engine in-flight) Dunno about this one. A bit of risk involved. The first time I did this was on my FI course.
- Extreme side/forward slipping with or without flaps (very useful technique in case of an engine failure, to make the field when you're too high) Slipping is part of the AOPA (UK) 'syllabus' and I would think that it is pointless teach it half heartedly.
- Steep descending turns (controlled spiral dives) - the fastest controlled method to get down on the ground in case of, e.g., fire on board. And the proper recovery technique of course. Roll, then pitch, but not simultaneously. A JAA requirement.
In summary, many good suggestions that should already be taught.