What do you think can be done to make roleplaying games more appealing to women (teenage and older)?
Be normal? I don't think there should be any special rules or pandering towards women, except to be respectful of course. But that should be towards all human beings.
Better yet, invite them to the table. The only reason why 3 of the players at my table are women is because I went out of my way to invite them to play and teach them the game. Roleplaying isn't something easy to pickup, the first time you play it's likely to be with friends and family.
So invite your (female) friends and family to play! Maybe starting with some boardgames and moving into a Pathfinder society game (using a pregen) where there is no commitment or work to be done. That's how you bring women (and people) into the hobby.