I would also like better inventory. `/isearch` is critical, but not that great. A lot of the information that I need to make decisions is multiple clicks. Other games have definitely done it better (e.g., WoW, GW2).

I appreciated the Zodiac Glass and Anima Glass as UIs for seeing progress on things and I wonder if SB, ShB, and EW could have had similar experiences. It would have also been nice if they were unified into one relic UI so that you could see the progress of each relic for each job for each expansion in one interface. That would be my dream. It could even store counters for progress towards relics including those key items getting them out of your inventory. Light was just a stored number somewhere between 0 and 2000. Why not apply that towards memories as well. If I had to take a guess it's because that memory is unretrievable whereas items in inventories are. Once gone, they're no longer taking up space in the data center. A quick look shows about 30M characters. So, each additional piece of information is at least 32MB times replication for the current customer base.

So, the big reason for specialized storage is specialized UI to make using that storage better.

A tacklebox could be filterable to your current zone or expansion.
The glamour stuff has been well-covered and there are excellent examples already.
A crafting box could be filterable to an expansion or star-level for *-**** ingredients.
Things specific to a system should stay with the UI for that system and not require space (see above discussion on relics).
A toy box (e.g., WoW) is also a good idea for all the little effects we want to do. I would love to be able to use those, but I cannot justify the space.