Well more women on set have some practical advantages for the producer. Women are about 90% LESS likely to sexually harass opposite sex members of the crew. This is an on going problem with male crew members. Women crew are also a lot less likely to be abusing alcohol during a shoot, another on going problem with men. Women crew members also tend to swear a lot less than men as well, and tell lurid sexual jokes on set. (Although everyone appreciates a well placed, "That's what she said," while filming is under way.)
So in conclusion, I wish a lot of men would clean up their acts on set. I have a long list of men that will never be coming back onto any of my sets due to very poor conduct. That list only has two women on it.