untill such time as you can reskin your gear with any motiff you own adding new motiffs seems essentially pointless as it is very doubtfull that people will trash sets they have upped to gold just to recraft an item and then up it back to gold just for a new look.
And with monster helm/shoulder and dungeon/trial/zone gear locked in appearance again what is the point of adding new motiffs?? cant even utilise the ones we already have.