For me, this Chun Li is in a very regal pose, which the fits the high priestess look of the Battle dress. The Alpha successfully channels that pose into a more challenging one, which works for the athletic look of that outfit. The Classic I personally prefer in more of a combative stance than a sexy one (hence why I'm waiting for the Ultra version), but it's still a comfortable middle ground between the two alternates. Too much time and money for these to base the decision around sex appeal.
However, if PCS shortens the production turnaround time for these in the future, I will reconsider that for Cammy.