The Lupin had their lore very well entrenched within the Doman region and might have proved difficult work for the Devs in making customization options.
Plus, there was also the fiasco with their "wolf" gear as a reward during the 2017 All Saints Wake event... lets just say it wasn't well received... and this possibly gave the Dev team an additional indicator that the Lupin may not be the route to go for a new race.
https://jp.finalfantasyxiv.com/pr/bl...1016_me_00.jpg
