Adding to the eternal "I wish there were more males" refrain—as crew, as sexable NPCs, as sires for pregnancy, etc.
Also: I'd love to have some more exhibitionism content—especially variations on the exhibitionism masturbation scene. As it is, once you've maxed out exhibitionism, all you really get is one repeating scene and one strip show scene. Even just having a couple different variations on that scene that the game could randomly pull from so that they aren't all identical would be really nice.
Even cooler would be if you could activate different scenes in different areas. Right now, the only feature like that I can think of is the cop who gives you their number on Tavros and the fact that it'll say something like "a few [species native to the planet you're currently on] stop to watch," but there's not much beyond that. Even just one scene per planet that actually takes the surroundings and situation into account would be nice: like, scandalized Red Myr staring on in shock at an alien masturbating in the streets on Myrellion, pirates catcalling and whistling at you on Zheng Shi, Raskvel creeping up to try to use you like they do during Anno's petplay scene...
I'd also love it if there were more options at brothels. There tends to be only like 1-3 sexable partners per location, which is weird for a brothel. If you're working at Beth's there's a wide variety of potential customers who can randomly hire and use you in different ways; it would be cool if, along with the couple of named NPCs you can hire at each location, there was some kind of "just give me someone random" button you could hit to get a random encounter picked off a list of a few sex scenes, maybe extra cheap compared to the other options to compensate for the unpredictability. (Maybe throw in some other features like higher odds of catching an STD or occasional odd status effects to make it interesting & give another reason to choose a random hook-up over one of the named NPCs.)
and some special races can have more kinds of tease attacks, such as frostwyrm can use psionic power to connect with enemy and throw those pornographic things directly into enemy's head, succubus can using high heels to better show their sexy body curves, kaithrit are more flexible and can do many incredible hot poses, like bending over to lick your own pussy or butthole, suula, vanae and myr can spew their venom like "milk squirt" ,or use pheromones to cover and control your enemy, just like the zil male in the date with Fisianna, not just a monotonous repetition of descriptions.
I like this idea! I remember reading ages ago that in developing TiTS they decided against letting your transformations give you strategic advantage, (since, in contrast, in CoC1 certain anatomical features could be useful in battle—which meant if you wanted to maximize your combat potential you had to select for useful features rather than your perfect sexy wish-fulfillment build). But if it was integrated into teasing, then I'd think it would be easy to give those perks the exact same weight in battle, just change the flavor text a little to something that acknowledges your character's special species traits. Like, the kaithrit self-lick idea could easily be text that might pop up during a butt tease. Have a Treated character moo or make cow jokes in place of typical breast tease text, have a naga-tail character do a little belly dance that shows off their tail during a hips tease, etc.
It might not be too far out of line to do a "Special" tease button for things like venom spewing or pheromones, if its damage is calculated the same way that something already existing like milk squirt is calculated, so that these special tricks are all weighed equally and there isn't a massive strategic advantage to adopting any one particular trait.