I don't know if this is already asked, but I think the inventory system is a little weird... I don't like having empty slots in different pages and its hard to look for certain items sometimes...

For items, they should be able to sort by type, just like the Marketboard. I feel like they should implement some mechanics from FF11. And I feel we should have to option to switch between a thumbnail layout or a listed layout also.
Armors should be able to sort by level or class, jobs, etc...

Just my thoughts..