Well, there are macros for changing gearsets 'on the fly', but as for hotbars. Well, we do have 8 hotbars per class/Job/Extra Job. On Bard I'm only really using 2 and a half hotbars (one being the default utility hotbar). Changing hotbar could be as easy as holding 'select' for a second. But this doesn't seem like the answer you want.