Why they don't release more bosses attires as glamour?

Basically title, there are so many cool bosses assets that end up forgotten or underutilized... The only exception to this was Azeyma's attire and Omega-M and F on the online store, as far as I know. I mean I love these but what about Byregot, Rhalgr, Nald'thal, and basically all the rest of the twelve... what about the Arcadion bosses? Half of those already use very similar body models, it should be very simple to rig it to the player's model. I don't even ask for it to be free, it could be a store purchase but please let us wear them! It seems such an easy way to make money and they completely ignore it. Not to mention hairstyles... they literally already have tons of assets ready to use.