Yes, if for no other reason, to attract more first-time fans to women's basketball. The novelty of holding a game outdoors is in itself a draw. Especially, if you've got a big name team playing. Then the match becomes more of a David vs. Goliath contest. Nobody expected the Sun Devils to come within four points of an upset.
Weather is unpredictable.
This is not an arena for basketball. I personally would not attend an outdoor game. Ga. I think more games should be played outdoors on playgrounds in warm weather places in order to save money. Not much of a case, but my thoughts nonetheless. I don't mind arenas though, they can get really loud if the fans care about helping their team win.