The new crafting system has represented a huge buff to items with guild augment slots. Unfortunately the only way to know if something has an augment slot is to actually look at the item description. It would be nice if there was a way to see at a glance whether something had an augment slot, especially in end reward lists. I can't imagine the number of times people have picked heroic deeds over an item with a large slot due to this difficulty.
You wouldn't have to actually add the text "large/tiny/etc. guild augment slot" to the item name, this would perhaps be too long and cumbersome. A good way to handle this would be a visual clue that players would rapidly get used to, like an * at the beginning of the item name for a tiny slot, # for a small, etc. Another way to handle it would be to put a colored border around items with augment slots, like how epic items have a purple border except augment slots would get a different color.
EDIT: Also, others have made a good point. It would be REALLY nice to have the ability to search for large guild augment slot items on the AH.
Cheers,
-Xexa