Let me just start off by saying when I heard that this was intended to be a sort of spiritual successor to packedrat, I was already intrigued. Your spritework is really really good, for whatever reason I have always enjoyed vore in a sprited pixelated medium to more 3d and realistic approaches, and you certainly do not disappoint. Of the few things that are already present its clear you have a good vision for this project, and I am very very excited to see where it goes. Now, onto my actual suggestion;
Enemy Suggestion: Rabid Squirrel - A squirrel boy afflicted by the curse whose anatomy was significantly changed by it, (has very large nuts lol), the enemy would be pretty feral, having a darting sort of behavior or lunging at the player aggressively but clumsily, upon catching the player attempting to shove them into their oversized balls via CV. I think making them appear fairly innocent outside of engagement range could be a good trick with them, the curse only fully stealing their senses from them when they see viable prey, and otherwise acting as shy and cowardly characters, until the curse makes them go practically feral at the sight of the player, or other NPC's if that's a thing you've considered. On that note actually;
Mechanic Suggestion: One of my favorite but lesser appreciated features of the original Packedrat was that enemies could and would vore each other, and sometimes even had post vore interactions with one another (EX: The Deer boy CV's the player, then a harpy lands where the Deer is, and the Deer would fuck the harpy and fill her up with your remains), and I think that would be a good thing to have here, not sure if this was something you had in mind already, but I'd be remiss not to mention it. tl;dr I think Predators should have some interactions with each other. I would suggest things like powerups or abilities for the main character, but I'm reasonably sure you probably already had something along those lines in mind.
Overall, I really like this project and can definitely see the potential here, I hope this is at all helpful.