Asexual? Rather than base it purely on gender, try looking at it as a reflection of character personality. A good example would be the monk idle pose since; the male version can be perceived as a cooler/edgier pose, whereas the female version is perceivable as a more focused/trained looking pose. One or the other may not fit what they had in mind for their character or even race/clan. A female midlander may find the current female pose fine for them, but a female highlander might want the more rough looking pose the males have.
That said, it is all subjective per person. Some just prefer one pose over the other and don't put much thought into their character traits outside of gameplay. Male character's get Kain Highwind's iconic pose for dragoon's idle stance, but females lean on their lance in an, in my opinion, awkward pose.
I wouldn't be opposed to getting the poses for available both genders, but I'd personally prefer to see one or two more poses to reflect such distinctions in personality rather than just a copy/paste. It'd be super low on the priority list of things to be done, but it'd be a nice-to-have.
