For me sensitivity has increased, but not in a good way. My bf cannot touch my clitoris as it's just way too sensitive to the point of being painful. I could even think about having it removed.
As for erogenous feeling, that has decreased. The genital area doesn't give the same pleasurable sensations that it did before surgery, although it is still sensitive enough to produce orgasm, but orgasms are weaker.
There is some sensation internally but I haven't had sex yet so I don't know whether it would be pleasurable or not.
Edit: I should add, I'm 1.5yrs post-op.