Things that should be changed or fixed already (because you haven't fixed it yet)

[Airget]

It's not really an excuse. There's a limit to how much data you can write per second and until we get a new standard, it's not going to see a big increase. Atm character data gets updated every 15 seconds in case of a server failure. If they were to increase character data, the write delay would need to be increased. You will only want them to take the risk until your character data gets rolled back. The moment it happens, the forum is full of "I LOST MY XXX, PLS FIX SE!" threads. The only thing they can say after that is "Sorry, we can't return the lost character data"

And the main point people forget, is a character, one player in XIV is equivalent to this.

1 FFXIV character=WoW classes Warrior, Hunter, Paladin, Rogue, Priest, Death Knight, Shaman, Mage, Warlock, Monk, Druid, Demon Hunter etc.

Count that 12 classes. XIV currently has 13 classes and 12 DOL/DOH. Now think about this. Imagine if WoW allowed you to play all classes on one character, think about your inventory management then and then come back and understand why it's not as easy as you might think it is.

[Arashmin]

Considering how much downtime is had these days, I doubt that a 20-30s delay, for example, will really have any consequence more than what a 15s delay already has, and for most content it's trivial to get back to where you were to achieve that. Whereas the amount of time it saves players as a whole to have the inventory expanded upon is probably a far great benefit than any individual setback that may arise.

They also really need to stop cheating us out of inventory space in other places, too. There's no reason for maps to not be stackable, nor is there any good reason to not have scrips have their total cap be not capped at all and have people spend things directly as scrips instead of turning them into tokens first. But they do... I kind of suspect it's a guilty pleasure of theirs at this point.

[Naunet]

Count that 12 classes. XIV currently has 13 classes and 12 DOL/DOH. Now think about this. Imagine if WoW allowed you to play all classes on one character, think about your inventory management then and then come back and understand why it's not as easy as you might think it is.

It's really no different, actually. Games where you can be one class still have to account for enough data usage to encompass all potential armor sets and whatnot in the game, regardless of class. Just because one might play a warrior in WoW, for example, doesn't mean that they can't or won't store cloth or leather or mail armor in their inventory/bank/etc (inventory/bank space that gets regularly increased, I might add, without players being asked to pay more for their subscription). This is why account-wide armor appearance saving designs are so attractive, also, as you only save the data once and then it's available to all characters. Whereas in FFXIV, if you have multiple characters with gear stored for glamour, all of those pieces are stored individually.