Hello,
I don't believe I'm first one to suggest this feature, but I haven't seen much of mention around or during the letters.
Basically, "Glamour Catalog" is a collection of the gears' glamour of acquired geared that no longer has any use for the player other than the glamours images. Additionally, when the player decides that they want to save the glamour of an equipment, they would have to "destroy" the item in order to gain the image of an item.
By implementing such feature, the players would be able to retrieve the glamour of old items at any time without the needs to go through certain dungeons, probably multiple times, to gain such items if they decided they would like to use its glamour later in the future.
Also, such feature would beneficial to game in general as it would increase the population of players that would go through older or lower contents to collect the glamour of various items for their catalogs, especially, when the level/iLevel cap is increased in the future.
Additional feature along with the catalog, is to have a "dressing room" or "Tailor" where the players would be able to check the appearance of combined items collected in the their catalogs.