The UI isnt broken and doesnt require fixing.
It works as it should, and lets you manage your inventory and menus without any bugs.
If there were bugs then yes it would need fixing, but if there isnt then there is nothing broken about it.
If you dont like the UI that bethesda implemented (I dont like it eitrher), then you have to wait for, or create a mod.
A working UI needs to be seamless, efficient, and organized. Skyrim's
PC interface is not efficient nor is it organized, in fact, it is far from it.
-The favorites menu is a garbled mess that doesn't even have the common [censored] courtesy to tell you whether what you're equipping is a dragon shout or a magic spell. Everything in the favorites menu is organized by name OVER type. It should be the other way around: Type -> Name. Hell, they could even organize the favorites menu to include sub-categories, or they could at least put a note in brackets before or after the item so we know what we're [censored] equipping (this applies heavily to renamed enchanted items).
-The perk menu is just a total mess in that it completely [censored] on mouse and keyboard users due to the the menus inability to tell the difference between a mouse click and WASD. Also, there is no way to zoom out from the skill you have selected while also keeping it in focus, instead it just kicks you right back to the skill overview.
-Hot-keys are completely junk as there is no way to differentiate between left hand or right hand which completely shafts dual-wielders, and there is no way to set weapon/magic combinations. That's very intuitive.
-The actual menu itself is also bugged in that it has difficulty actually high-lighting what we're selecting properly. This is also the case for NPC dialogue selection where the interface likes to switch between Mouse and keyboard half of the time. When I really think I'm high-lighting the Potion of Stamina, I'm actually clicking and using the Potion of Magicka, which I don't need, thereby wasting the potion. When I think i'm selecting the option to barter with the trader, I'm actually selecting the option asking about what they do for a living or if they like Whiterun.
Some of the UI works, and most of it doesn't. None of it was designed to run seamlessly on the PC and all it does is further confuse and slow the menu process. Everything about the PC UI is a [censored] after-thought, and if Bethesda truly cared about the modding community, they wouldn't go off using .gfx file formats that use tools that are NOT available to the general public, and instead are used by companies and special design studios. Case and point, Action script 2.0 which uses .gfx format. They tell us that they like what the modding community does and try to implement their ideas, well, the least they could do is look to DarN and ASK him for some [censored] advice on the interface and maybe shoot some ideas over to him and let him provide some feedback. OR, if it's too much trouble (legal) to ask someone outside of the company for help, they can at least look at his mod (DarNified UI) and see what people like about his changes to the Oblivion UI and apply that to the Skyrim UI.