"I think I understand why the THT is used for the man on 4 the reverse turn. i am not so clear why the situation should be any different for 1 of the qor for the lady. wonder if you coud iluminate. thanks."
The man has foot rise because his more dominant role in the partnership means he is not as simply under the swing as the lady would be if she were on the inside - he starts out almost as if he will be under, but as the feather finish blends towards something commencing more of a forward feather, he needs to be somewhat on top, and that requires the slight spring or rise in his foot. The lady staying underneath would not have the same kind of spring in her comparable action.
You can see another example of the role-difference in footwork comparing the three step and feather to the reverse wave and back feather - the lady going backwards has TH TH TH, but the man does his comparable backwards actions as TH T TH.