I have been advocating Gender Respecification for bridge officers for aeons now.
Some people prefer collecting bridge officers of a certain gender, and it is often difficult to get the proper gender/profession/quality combination, especially for the purple bridge officers at Admiral-level (I would imagine the KDF has the same dilemma at General-level).
We need an in-game way to change the gender of our bridge officers.
Try not to forget Lumba. Quark's gender was changed by that wacky Dr. Bashir in DS9. Then changed again. So, yes. Federation medical science has advanced gender re-assignment surgery. So why not offer that in C-store?
City of Heroes has an interesting microtransaction item that allows you to have complete freedom in the tailor. Without this item your build and gender are fixed at the moment of character creation, but with the item, you are allowed to create Bruce Banner/Hulk and Ranma. Might be roleplaying a shapeshifter that changes gender. There are numerous shapechangers in Star Trek, the prison girl in Star Trek 6, Q, changelings, and I am probably forgetting a few. So there is an IP reason to have more flexible options for aliens.