Exactly what it says on the tin. The ability to relocate a subject from one rack to another within a single session would be a nice and simple quality of life improvement.

Have a type of bondage involving spiders and web.a robot like spider that you can craft and use in a session to wrap up and be put in a position you make the spider but the npc in

Breathplay, forced pot/poopper inhalaton, breathplay...

The subject could have certain areas that are more effective in tickle torture. Stuff like maybe their toes are more sensitive then their furred sole or pads? Vice versa? Their feet are so so but their pits are just too much for the to take? Just fun ways to find what spots make them squirm and plead more. Randomized spot finder. Maybe certain areas get more sensitive when other things are done/applied to them (oils, brushes, etc)

A menu that can be pulled up to quickly teleport to important areas or access important features to allow a simpler experience. This menu would only be unlocked after completing the tutorial (or in free play) and would include access to the shower, client selection, and research screens, along with whatever else is needed, and have buttons to teleport to each client. This menu would likely be the default screen when pressing Esc.

Fek, I think you should consider about start adding new species to the game. Maybe one new species per update isn't much additional work?