There shouldn't be women's division in any sports. Not in professional sports anyways. If you can't hang with the boys, too bad. There is a reason why no one watches women's sports. Because women are not built for athletic competition, so it's boring to watch.
Seperate divisions is fine for grade school sports and intramural teams. When it's just for fun, girls should have an all-girls team they can participate on. But when we're talking professional sports where the athletes are getting paid to perform, what's the point? Why pay a female athlete to play in the WNBA when she wouldn't make the D-League in the NBA? Or how about track and field? I didn't get paid for running the 800 in 1:58. So why should a woman? Women want equality in the work place. Well, professional sports are "the workplace" and things are hardly equal.
Women have proven that they can perform as well as men in the corporate world, the science lab, as medical doctors, etc. And they should be treated as equals. But leave the sports to dudes. Women have not yet attained equality in that department. If a woman is good enough to play in the NBA or MLB then give her a contract. Otherwise, what's the point in creating professional women's divisions?