Dunno what exactly do you mean by UI.
I think it should be part of character creation ... just as you decide your background, your apearance, your skills, your ability scores ... there should be another tab, where you can pick your starting gear.
I mean isnt that perfect time to explain new players how different armors and weapons work?
Take Finesse weapons for example ...
Its good to know what they are, but once your character is done ... kinda too late to find about them, isnt it?
I would certainly be kinda frustrated if i would invest points into Str for my Rogue, just to find out later in the tutorial, when my ability scores are allready set, that Dex would do just fine (and even better). :-/
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Then it would all depend on how creative Larian team indeed is ...
In perfect world, we would get:
- generic armor
- class-specific armor
- some kind of clothing/armor based on background decision (armor if background provides proficiency)
- some kind of clothing/armor based on race (armor if race provides proficiency)
- and some kind of generic clothing
Generic armor we all know, those are things we loot during EA ...
Heavy >
Ring Mail ArmourMedium >
Chain Shirt /
Hide ArmourLight >
Leather ArmourCloth >
Simple RobeClass-specific armor is also nothing new ...
Except for Cleric, Fighter, Ranger, Rogue, Wizard and Warlock ... they dont have any right now.
(
And no, i will not stop complaining about this. :P 
)
Background armor/clothing can be tricky ... so i would certainly understand why Larian would leave this out.
But i dont think we need anything super crazy, it would just be nice to have some kind of cowl for Hermit ... generic amor with some kind of crest for Soldier ... some shirt and pants for Sailor ... shool uniform for Acolyte ... fain clothing for Noble ... ripped clothing for Urchin ... stuff like that.
And best part? Those things could be used for NPCs! So it wouldnt be wasted work.
Race armor is something i would also understand if Larian would leave ... especialy if we dont get any way to transmog our gear. Wich would be shame.
On the other hand tho, if we would! <3
Call me crazy if you want, but my Dwarf would never, ever, EVER, switch his "properly made dwarven steel".
Anyway, i certainly think that this should apply at least on those races wich are somehow special, or specific ... meaning certainly Githyanki, probably Drow, maybe Dwarves, with clear distinction for Duergars (if they will be playable) bcs Duergars have quite differnt approach craft from other Dwarves, Dragonborn (if they will be playable) and Half-Orcs (if they will be playable) ...
Cant really imagine anything specific for Half-Elves, Gnomes, Humans, Halflings or Tieflings ... :-/
And generic clothing are of course things we see on NPCs in the world, especialy on Tiefling refugees ... just dresses, shirts, pants, stuff like that.
Nice thing about this is that clothing from this selection could easily overlap with clothing from Backgrounds, so there wouldnt be ... well, lets say more work than necesary.
I know changes to get this exactly are next to none ... but man can dream. ^_^
//Edit:
Just a small note ... im talking here about MODELS only, ok?
I dont really need 15AC as a started for my Githyanki armor, im perfectly fine with 13, as any other Medium Armor ... what i want, what i need one could say, is option for my Githyanki to look like a Githyanki.
Same goes for Drow, wich also have armor in the game, but its stronger ... i would be perfectly fine having Light Drow Armor with 12AC, just as regular Leather have ... as long as my Drow can indeed look like a Drow!
What really pains my heart is that there is regular brown Leather armor ... then there is exactly the same armor with black sleeves, and its Rogue armor ... and then there is exactly the same armor with green sleeves, and its Ranger armor ... :-/
Oops i did it again!
//Another Edit:
Maybe i should have also said that bare minimum i would concider acceptable ...
Would be Generic armor (wich is allready done) / Class armor (wich i whined about twice allready
) / at least few pieces of regular clothing from NPCs ...
Githyanki and Drow armor would be welcomed bonus.
