Assuming Tomestones of Poetics will never leave the game, I want to suggest a feature to give value to them.

Leveling instances (not sure if past Lv51) as we know always grants you an item for your role automatically excluding the instance loot.
Yet, there are the Lv50, Lv60 and Lv70 instances specifically where you simply have to be lucky to get specific dungeon items.

Now, I know tomestone gear and crafted gear > instance gear, but for the sake of glamour, this is quite a nightmareish conquest to keep re-doing an instance just to get a certain item. From my own experience, I did the Neverreap over 18 times just to get my hands on a Baldur Blade for my DRK. (Yes, I know tank queues are fast, not relevant.)