This 9 minute video goes through every single item that was improved. All credit goes to the creator.

https://www.youtube.com/watch?v=Glc9u-tvl8Q

0:01 Intro
0:20 Chillrend
0:38 Dawnbreaker
0:49 Dragonbane
1:15 Ebony Blade
1:24 Ghost Blade
1:37 Mace Of Molag Bal
1:50 Mehrunes' Razor
2:03 Nightingale Blade
2:16 Nightingale Bow
2:44 Red Eagle's Fury
2:55 Red Eagle's Bane
3:06 Gauldur Blackblade
3:21 Gauldur Blackbow
3:41 Rueful Axe
3:56 Sanguine Rose
4:05 Skull Of Corruption
4:20 Staff Of Magnus
4:33 Volendrung
4:46 Wabbajack
4:59 Wuuthrad
5:10 Archmage's Robes
5:21 Ebony Mail
5:35 The Gauldur Amulet
5:46 Masque Of Clavicus Vile
6:09 Necromancer Amulet
6:19 Ring Of Hircine
6:29 Ring Of Namira
6:38 Savior's Hide
6:52 Shield Of Ysgramor
7:06 Spellbreaker
7:21 Targe Of The Blooded
7:32-918 The Nine Masks
9:19 Ending