ima say what give me alot more motivation to push through would be scenes with the furry, and npcs like maybe at first it's some light stuff but as the game goes on it gets alot more horny?
And also the battle system itself, maybe shake things up with group fights where all your furry fight at once. Then you could add things like a taunt ability to wg furries to be true tanks.
On the other side I'd love to see a perk system that alters a furry playstyle depending on what you pick, like maybe for the cow, variants on her milk, like one that restores like 2-3× the health but only on one furry.
And also a separate progression for the expansion path, like breasts having more uses for mana via using it to soak damage, or expending a portion of their max mana to deal Extra damage on their normal attacks
Oh and also I'd love to see a "nemesis" enemy, one where they're like a random boss in each area that gets harder and bigger each time you best them in return for more rewards, like for example. Chilly cheeks getting more muscular each time you face her.