What about a room or just the possibility to emulate area like beach, forest or desert for "scientific experiments ", naturally with themed gears

Add the option to cumbrush your subject either with your or their cum

is someting that havent been done even in rack 1, also it would make posible to do multiple actions by a single character

No gore, but if there's an option to modify a subject's body and you alter it sufficiently (e.g. creating a dickgirl/cuntboi/nullo or altering them completely) they remember the gender they were and react variably (e.g. some are happy with their new body and aroused, some are horrified/upset etc etc)

I'm thinking about this scenario where you could drug a test subject or whatever and then let him satisfy him/herself however he/she wants (assuming test subjects in Rack 2 will have, like in the first one, sexual preferences). A male could go grab a toy and masturbate or a female that likes watching could use those sort of automatic toys on other test subjects and many other.

Personally, I don't think such a feature would be hard to implement. It doesn't have to be too complicated (merely randomizing between the three highest fetishes of the subject and eventually a little bit of pathfinding would suffice, I think) and simply giving the option would add quite a bit of depth.

I really hope this makes it's way into the game. I think that for the effort required to implement, it adds a lot of depth. If I'm wrong, sorry for assuming.

Since some of us may enjoy a bit more testosterone for our characters, this should be only appropriate.

It'd be pretty cool to see a skinny goth otter guy in some metal band shirt, spiked bracelets, and programmer socks getting jacked-off. Or a chubby tiger lady getting buttfucked in a tube-top and platform heels(Neato!).From sports jerseys to bikinis, a little covering can go a long way. A naked body is sexy, but I think sometimes added clothes, revealing or not, can add another pleasant layer to the whole.

Using special table or where you want(maybe on chair)

I know watersports are a maybe, but since tickling is going to be included I feel like having the option of making your subject pee themselves after a certain amount of tickle torture would be really cool. and them have them be embarrassed would be a plus too. 

a multiplayer game, so you can choose reactions and listen to commands.