w,
Just quickly:
1. Yes you can get shear with an inversion, very much so, but not on a calm day.
2. Going around is something which may well be the best plan of action, I was merely surprised that someone who professes to be such an experienced hand got caught out by something as mundane as downdraught on approach to a hill strip.
See what your saying about conditions being different from forecast but we PPLs and certainly studes should be able to expect even a low hours instructor to reassess the weather/wind situation during the flight.
3. Windspeed and turbulence can but do not have to be linked.
4. Think you have mellowed at bit, which is nice.
FD