SE needs to do something about inventory. Even the armoury chest is running out of room now that there are 12 fighting jobs, 8 crafting and 3 gathering, each with unique gear. That fills 23/25 slots, leaving only 2 for situational gear sets. That will be gone completely once the next jobs are released.

For general storage, there are some big space killers. Culinarian ingredients takes up a full 3 pages of one of my 4 retainers. Fishing tackle has long been a problem. Dye, materia, gardening supplies, are all things that can burn space quickly.

Designing a solution should reflect the current pain points.

A separate tackle box would be huge for in field inventory. New storage options (maybe tied to housing but that is another sore point for many) could be designed such as a Pantry (for cooking materials and food), a Garden Shed for seeds, soil, chocobo raising supplies. One advantage of housing tied storage is that there is no need to load data unless you are in the housing zone.