I don't see where the "great many systems" comes into play. The multi-stack function would ONLY be for storage. Should you want to sell anything you would have to extract the stack to your inventory, and then it would automatically split into HQ/NQ, then only could you "sell items in your inventory" As the resident crafter for my FC, i try to keep as much as possible on-hand for on-the-spot-crafting. there's no better feeling than seeing a noob with sparkle-eyes as you craft them an item to bump them up to the ilvl to enter a trial.