Animation sets are not just about being on top or bottom. Its every movement involved - and sometimes engines can't even translate animations for one rig to another. Shadowheart isn't running like Wyll - nor does she stand like Wyll or Lyzael. These are animation sets. If you start using gender neutral movements in the sex scenes - well yeah, that's cutting the quality significantly. Will still not solve cases with different heights as big as halfing to human or even dragonborn.
