Yeah, I see what you mean here. There was a point where I thought that perhaps Cara's size/weight gain was a tad too over-emphasized for my liking, and I thought that if the game were to keep Cara's size/weight gain to a more modest amount, it would be more palatable for me from a gameplay POV.
However, at the end of the day, CIC is a "vore" centric game, so it is understandable why the dev wanted to emphasize that point more evidently during the gameplay. Although, granted I can see your point on it being a bit of a turn-off for some. My stance is neutral, personally speaking. If there was an option/future route to have Cara more "toned" a bit, by all means, I would not be against such a notion.