Quote Originally Posted by CryBloodwing View Post
Well, I feel that maybe it will become dyable in an update that gives the seasonal event. It is just one item set and it would make more sense to either apply the dying ability in a big update, or when the seasonal event comes again.
The event is coming again.
https://na.finalfantasyxiv.com/lodes...dens_Rhapsody/

The reason it's not dyeable is because the devs are putting zero work into it, just simply turning it back on.