FWIW I have always thought it is a jolly good thing for every pilot to experience a spin at some point in their flying (I mean an intentional spin) but I am not convinced it should be a compulsory part of the PPL syllabus.
Would pretty much agree with that but if not during initial training then when as many PPL's will never go on to do aero's or anything that will let them experience spin entry?
Must admit I'm quite surprised that Spin training is not part of an FI rating as they are probably the most likely people of all to find themselves in that situation!
Some interesting analysis here on the subject though it is pretty old:-
spin recovery in fixed wing aircraft
Regards
UA