Ok going to start off simple here with the UI improvements
As of now its extremely annoying having to scroll through lists and lists of what's on for sale especially with the quantity of motifs. Please and extra search parameters such as alphabetical and doesn't already know motif. Also the same in your own inventory and banks.
Monk Skill line
I've seen this been suggested before somewhere but here is my overview of it.
Monks harness harness the magicka around them as well as enhance their mortal being. Monks use hand to hand combat, the more combat driven monks use different styles of 'brass knuckles' (can have all the styles of brass knuckles). Taking a page out of the monks in skyrim (the ones that can use dragon shouts) the ultimate can be a shout. Other skills would be steel resolve, meditate etc. have a parry skill where when you time the block of an incoming attack you stun/knock the attacker take 50% less damage from that attack (or 0). (could also be for an armor set 5 piece bonus
Necro/daedric/Aedric shrine skill lines
So I know necromancers have been suggested in the past but it would be good to have it as option, pair the skill line with vampires/werewolfs. [maybe we can become a lich one day could be a daedric lich or equivalent]
So Necro skill line/class, Undead Knight, Decay, corpse summoner; knight deals with minor leeching skills, decay deals with DOT skills, corpse summoner allows you to summon undead, (ultimate could be a minor bone colossus).
So around tamriel special shrines have been erected worshiping a particular Daedric Prince or 9 divine, worshipping at a shrine grants you a skill line with said aedra/daedra. e.g. Worshipping sheogorath grants you the skill wabbajack, giving a random effect. and thats about as far through it i've thought but any improvements to the ideas would be good, constructive criticism