More text commands would be awesome!

So far I've found you can order a model to different poses (depending on what is available in the scene) and 'open mouth' and 'close mouth'.

It would be great if they responded in dialogue with more comments and also were able to follow some more commands...

A few easy ones to do:
-= Changing head tracking =-
"Look at me" makes the model head track on the (imagined face/)camera
"Look at my dick" makes the model head track the tool... (however that sounds pretty artificial, maybe when the player talks about dick she looks there. so "do you like my dick" "get ready for some dick" would all make her look there.

I can imagine some pretty hot ones too but they would require animations such as...
"grab your tits"
"rub my dick"
"spread your pussy/cheeks"
"lift your skirt" (might be really tricky but pretty sexy too)

Good points,

Best would be if most natural language results in an action or some response.

So command like: Close eyes, Pee, Lift your hips etc. would result in some action.

Also improving the state for orgasms and mood in general (crying) is something we are exploring further.

More emotions would be super!

And orgasms too, (everyone should have them ) hopefully in addition to some sexy o-faces the models can thrash around and really look like they are enjoying themselves and some models could squirt (but not on my bed-sheets).

Indeed more reactions to our interactions is going to be a plus for the game. And I love my girls to feel what I do

You should also integrate the surroundings to these command.
For example in every scene you should designate chairs , sofas and beds to be interactive.
So you tell the woman to sit or lie on the "blue chair" or "red bed".

ALSO : Have you tought about intergrating advanced chat with the woman like with cleverbot ?
Could you maybe connect the dialog with cleverbot , or implement an offline version of cleverbot ?

An addition feature I would like is a lexicon or pre-selected list of common phrases that the women in game will understand. Different regional phrasings may cause frustration as the userbase expands and an in-game list of usable terms would help mitigate this.

bolded for emphasis! Like this suggestion

Definitely, and not just the happy/excited emotions. It will give the girls characters' a rounded personality (and make em better in the sack)

Strongly agree about the emotional complexity.

My favourite part of the current game is stubborn Sam trembling, shaking her head and crying before she gives in. The fact that we know she wants it, and her reaction when we mention the diary, is astonishing and unforgettable.

While the physics engine is great, it's these semantics that really take this game to a new level. Think of the companion cube in Portal - it doesn't actually do anything. But it is an incredibly compelling character and made that game something extraordinary.

Likewise the story in xstoryplayer is in many ways more important than the physics. Wonderful that you do both so well.

@gusman
Thank you, we try to put a lot of details in the story and think its an important element indeed.