Not sure why you have a problem with that, though. If you acknowledge that the stormtroopers weren't clones, how does it not make sense for there to be a female officer? Also, we already know that the star wars canon is far advanced past what we know from the movies, so it's not out of the realm of possibility that the emperor started recruiting women. Maybe after the rebellion there was a manpower crisis in the imperial army? Who knows.
That being said, it was a little weird having like half the team being female in the beta. Hopefully it's not too bad with everyone taking female, but it shouldn't really be a problem. Hopefully they add an option to remove character voices though.