Well, maybe you stop dividing it on gender and start dividing it on genre.
I've always wanted to do this. I enjoy reading a Top 10 action/horror/comedy/sci-fi/fantasy etc. of the year type of lists. Although I sadly don't see enough films each year to perhaps always warrant five nominees in each category (also my favorite nominations are always the Saturn awards
)
That being said, I'm quite comfortable with how the Filmspots are now and wouldn't want to make it more complicated.
As for a performance category... I personally like the separation of Actor and Actress for the reason jmbossy said. It's unfortunate that I don't see enough films with female leads. I realize that is something that I can personally rectify, but at the same time... The movies I often want to see just so happen to often have a male lead.
Huh... Looking back of the three films I saw that had female leads- Gone Girl, The Theory of Everything and Wild, two of them also had a male lead as well.