I will agree that FFXIV needs some sort of engine update/upgrade.. hell.. the devs themselves have acknowledged this and are regularly hamstrung by the limitations they have to deal with. It's why a lot of the things that make us go 'why can't they just do this.. it's not that hard' are not done, because somewhere somehow the engine or decisions made in 2.0 development are the reason why they can't do it.

Inventory is a perfect example, we get all these strange workarounds like chocobo saddlebag instead of just more inventory space.. apparently because it's not all that simple.