I understand this is probably a really popular request but honestly I feel I have more than enough storage, and not saying that to be contrary.

Saddlebag is full of fishing bait.
One retainer has one tab full of items I may need such as Eden tokens, rathalos tokens etc. Another has a couple of tabs of crafting items and materia.
I use one bag of the four for food, potions and and am 300/400 on the glamour closet. Armoury chest generally is about just over half full.

The problem is while you’re levelling jobs you tend to amass a lot of stuff. But if you regularly keep on top of your inventory (vendor, list, desynth, trade cards, GC turn in etc) then you do have plenty of space. Glamour dresser is about keeping things you are actually going to use rather than a ‘got to have them all’ approach.

What i would personally like is the opportunity to sell more things at a time on MB.