I think that the biggest stop in allowing to hide/show just a single part of one widget is the design in itself. While some of the HUD elements can be toggled on and off they only come as packages. Earlier the most painfull one has been the duty list. Please break it in two, the Quest list to track quests, and to Active Duty block that has fates and dungeon stuff. That way people can hid one without loosing the other. I have no idea what's the basis on what the GUI is coded on but it seems to be clunky at best.