Tuco i haven't had any opinions yet on the UI, I've only started with my opinion on how they should refine their group actions and controls. For their UI tho, it is very lack luster. It needs some further refinement.
Coming from DOS2 they had a pretty standard and useful character menu and inventory. I'm sure they are going to polish it up more. And this is feedback to say, keep what was good and make it better.
The worst of the menus so far was the quest logs, its generally just missing a lot of meat and filler space to look more presentable and like a log for a fantasy game. Log entries in general could use much more information. Its looks bad that its a log information for the PC but its just like a sentence or two long.