I never thought about it in GW2, but it could not be that hard to add. Ultima Online is an antique game and it has had hotbars for years. Add as many hotbars as you want, put up to 12 slots on each bar. In each slot you put pretty much anything you want. Skills, spells, macro, item, mount, whatever. If it is an skill/macro/item (like a consumable) it gets used when you click it. If it is just an item, like bandages, you can click to use it, or just monitor how much you have. Extremely useful bar.
I have never tried... but can you keybind a consumable? Make a macro out it? I do not bother with food in this game, so I do not know.