I don't know why I'm surprised, but the number of people who wrongly assume they know how the game works on a technical and production level and how easy this should be to rebuild or fix is truly astonishing.
Coincidentally, from the
latest livestream (translation by the r/ffxiv Discord server):
Please remember that we have no idea what the developers have to work with, and that due to the nature of the game they are constantly busy working on future content, and can only provide quality-of-life changes sparingly.
If you want to use WoW as a reference, please look at the
patch changes for Transmogrification and how much time passed between the initial release of the game, the first implementation, and each subsequent update.
If you started playing after Stormblood, consider how glamour worked before the glamour dresser was implemented. Or how there used to be different types of glamour prisms. Things used to be way worse.
In the 65th Live Letter Yoshida said they had already looked into implementing a "glamour catalogue", they had the text ready for it and all, but the sheer amount of data made it not possible to concretize for now.
So we know they ARE looking into improving the glamour system. But technical limitations and higher priorities (like, I don't know, improving the server overload and maybe resuming sales?) mean this still has to wait a while.
Expanding the possibilities of the Armoire is not the perfect solution to this problem, but it's something that would already help a lot and, hopefully, should be easier to implement than a complete overhaul of the glamour system.