I'll start by saying that I've really enjoyed what we have so far. That said, I'm sure I'm not the only person who would like to see certain things added or altered at some point, since the game is still being developed. I'll skip obvious things like the fact that much of the artwork in game does not reflect the actual appearance of the Hiro that you make, because it seems pretty clear to me based on how much art and animations do reflect your customized appearance that this is already something the devs are thinking about.
Firstly, the balance could use some tweaking. Strength feels generally less useful than Agility, to the point that my first Agility build felt like cheating when compared to my old strength build. The go-to Agility class (Thief) gets objectively superior features to Warrior. Thief gets two extra Skill points *and* extra Gold, while Warrior simply starts with a single extra skill in Blitz (which I tended to find less useful than ordinary offensive stance skills) and the entirely useless Weak to Anal. Strength makes it easier to break grapples, but I found that even when running Agility and putting in little investment in Strength, I was still able to break grapples pretty easily. High Agility, on the other hand, makes it so most enemy attacks never touch you. This is without even touching how broken the Agility-centric Stealing mechanic is. In a system where sources of money tend to have downsides (brothel work) or simply be unreliable (gold caches/ogre encounters), being able to walk into the first down and grab the Diamond Armor for zero cost is pretty nuts.
There's a few directions one could tackle this from. Off the top of my head, having Strength contribute to equip load instead of/in addition to Endurance would be logically sound while giving it more of a niche. High Strength could also give bonuses to resisting physical damage (worked for Dark Souls, didn't it?). Less directly, buffs to the Maul could make it feel more like genuine alternative to a Shield and Rapier/Broadsword combo, which would be an indirect buff to Strength builds, but still provide an incentive. On a similar note, Strength could be made more useful by making Grappling more threatening. Aside from the Naga's Coils O' Death, Grappling seemingly can't deal direct damage, and doesn't tend to feel worth it.
This could just be me, but I also feel this game has some problems with conveyance. Many of the mechanics are obscure and not made clear in the game itself. Feels like I'm either scampering off to the wiki or hoping I can blunder my way to understanding via trial and error.
Finally, and this is a pretty small and personal complaint, but it bugs me a bit that you lose Dignity on seemingly every single scene where you bottom. I understand the need to balance whorinng yourself out by threatening Purity and Dignity, and I understand the loss of dignity when you get butt-fucked after a defeat, but losing dignity from bottoming in scenes that are entirely consensual or even power-bottoming scenes where Hiro is clearly the one in control doesn't make much sense to me, and means that nearly every scene with content I actually enjoy, I am mechanically discouraged from actually pursuing. Let me ride Trudy's dick or spread 'em for Urka/Kylria/Alma without worrying about how that's going to screw me over during a Dark Knight rematch, damn it.
Wanna close this out by saying once again that I love this game and am deeply grateful to the creators for making it. I don't have any expectation for the devs to implement these changes just because they'd make me like the game more, or changing the game specifically to please anyone else, but I think there's value in bringing up things we think could make the game better. What would you like to see changed or added when the game is released?