Yeah, normal steph is much more healthier than the bimbo path. Compare to bimbo path, the normal path steph is just a kinky girlfriend to MC.
I am afraid I don't really where did you get it. First, I don't get what normal is supposed to mean? Bimbo Steph is not some deranged psychopath, nor mentally impaired person. Second, non-bimbo vs bimbo is false dichotomy. It's still the same person. Kinky girl who's doing police officer job because it gives her financial stability. She dreams about being trophy wife with fake tits and filled lips. She wants it, and decision is only up to MC (he can chose to have her quit the job, and do the boobjob). WhitePhantom actually wrote about it, numerous times. Here is an example:
You're fulfilling her own dream. Steph can talk about wanting surgery twice before you even mention it. She's also jealous of the "bimbo" lifestyle, hence why she gets mad at the girls on TV not being grateful that they're experiencing it.
So yeah, if you fulfil what is her own fantasy she thought she could never afford, she's going to treat you differently and going to try and please you more than if you don't.
In short, it's not MC corrupting her in some dirty slut. She is dirty minded herself, simply she was not able to fulfill her dreams, until she met MC. If his (ie players) tastes and phanatasies match with hers, they will have richer sex life. If they don't they will still have relationship, but their sex life will not be as rich as in first case. Which means less scenes.