The problem with acting is the number of potential winners. You have usually one director, one screenwriter, one composer and others for a movie and two or more leads and dozens of support making it a lot harder to get an award.

But dividing it based on whatever someone is female or male doesn't feel right. Having two award for leads and two for support with no distinction doesn't work. There is probably simply no good solution. Personally I would simply leave it as it was saying it's tradition and it's allows to double the awards instead of removing it.