The devs dont have to add anything to the game, technically. This isnt really much of an argument. It's pretty much saying "Be grateful they decided to add [insert content here] to the game" where this idea can be explained with virtually everything that is in the game currently. And a lot of what is added to the game is done out of pragmatism - theyre a business who have an invested interest in keeping me purchasing a sub. If they think adding a new race will do that and grow the player base, then that is what they will do. It isnt so much a favor as a calculated move.
This forum (along with Reddit) makes up only a fraction of a fraction of the player pop. There are players (as I know a few myself) who do not post on these forums and would like to see Male viera and Female Hrothgar added. I would hazard a guess that if polled, most players probably would say (at the least) that they would like to see female Hrothgar and Male Viera added to the game at some point. People like customization and character creation. Which the devs actually know pretty well because that has been something that constantly gets brought up. Speaking of which....
I think this isnt quite hte exact way to look at things. It's not a check list on a wall, so to speak, but rather there are a few things that relate to one another and are likely being developed concurrently. As a point, what I said above is that more character customization is something that has been frequently requested. The devs have stated that due to how the old engine for character customization works, that it's limiting how things are done. It's part of hte reason why we have so few customization options overall, but also why some dont make sense (Why cant we get fitness sliders for all races? Or why do lalafell females have breast sliders when it does nothing). It is cause the engine is old and outdated and that is becoming more and more apparent. It is also the primary reason why adding new races is a pain in the ass. The ability to add more customization and new races/sexes stems from the same issue: The character customization engine is outdated and needs to be rebuilt.
So what would the pragmatic thing devs should do? It would be rebuild the character creation engine. By doing that, they can address two separate issues a lot more effectively. It isnt that "Oh, we'll worry about adding new races/sexes last" but rather "Oh, there are a few issues here that can be resolved if we tackle this thing over here."
Furthermore, outside of classes, character creation related stuff is usually a very hot selling point for FFXIV (let alone MMOs in general; Almost everyone loves it when we get more races to play as). While I am sure they will be adding probably one more healer + a dps class come next xpac, in terms of character creation side it would be a huge selling point to not only revamp the character creation engine so we can customize our characters even more but to also add the off sexes. This would be a huge huge selling point in terms of FFXIV and would generate a lot of hype. It would be an excellent move development wise for the franchise and probably pay for itself pretty quickly as a result as well as extend the lifespan of FFXIV as a whole.
So no, I would make a safe bet that it isnt 'bottom of the list' but rather is something they are actively interested in doing but have to work on other aspects first to make it happen.





