I've been playing on and off for a while since the game launched, so my feedback might be outdated. My biggest grip is that the part I find the hottest (Myrellion) is at the exact point in a playthrough where I need to take a break, and once I've felt the satisfaction of a break I don't feel like picking it up again for a while. That's probably not fixable though.
You can't take the hot as hell red Myr doctor Anzhela on a date. It's a crime! (Yes, I should probably just try to write it myself.)
It's probably not workable, or at least I'm outside the target audience, but I find the descriptions of the TFs themselves hot as hell. So a way to spread those out would be nice. I put something over in the "you would like to see" thread. Or maybe a few prestige TFs, where if you've been rocking a form for a while, you can get a TF or two which is a cherry on top. Hard to imagine what those would be and the sheer number required probably keeps it from being viable.
There's not a slow feminization/masculation item/consumable for when you want to slowly lose your cock/gain a cock or other sexual features.
Oh it's really hard to get the subjugate Taivra option as a nice character. You have to intentionally throw negotiations in a way that seems out of character. Look I'm sure she's a fantastic wife, but uh, I'm saving myself for someone special!(also afraid of intimacy.)