Please add item sharing within account

[Canadane]

You can if you happen to befriend your alt. Then you can use mogmail. But that's unavailable to most people.
Use a FC chest or something.

[Michimeow]

I understand that there are work arounds. But if we're looking at a pure quality of life perspective, there is almost no reason make difficult the sharing of basic resources within one's own account.
Getting gil from one char to another simply requires a friend. But if you have a lot of leveling gear and tools that are non sellable/tradable because used, these should be allowed to be transferred to an alt character for its use as well.