Inventory- for one, purchasing an expansion should get you a free retainer IMO. We do need relief for storage issues, whatever form(s) that relief may take.
A complete wardrobe (glamour) system. A glamour log would go some way towards solving inventory issues.
Additional character creation option- faces yes definitely, more face options. There is just not enough variety.

As beautiful and sweeping a game as FFXIV is, I am really surprised the above are even issues and weren't seen to early on.