Theoretical knowledge, language proficiency, medical requirements, flight training and testing should be proportionate for a rating which would require a 600ft cloudbase and 1800m visibility for take-off, landing and at an alternate with approach minima no lower than 'full IR minima' +200ft for precision and +250ft for non-precision approaches.
So I'll ask you, as I did on the other forum, to identify which aspects of theoretical knowledge, language proficiency, medical requirements are relevant only in the last 250 ft of an IAP. Then we'll understand what is necessary for the full IR but not the limited IR you propose.