Hi,
for the little I know about the technical stuff, the GUI (as in the icons you can click on to open stuff in game, party window, etc) is handled by/in the hexed. So, if a player prefers the old GUI and other player likes the new one, is it possible to add them both and let the players choose how the GUI will be displayed? And if it has some kind of limitation on that, is there (will there possible be) a workaround for that?