After the UI update the old ability icons look blurry and low-res. You can use Clean Icons - Mechagnome edition which AI upscales all abilities in the game for much sharper resolution :
GitHub - obble/modui_classic: modui: for wow classic
Bag interface bugs - Tukui
Which addons are you hopelessly dependent on?
Removing/hiding the micro menu and bag bar? : r/classicwow
TOP 5 WOW BAG ADDONS - YouTube
Help each other out with the new UI - General Discussion - World of Warcraft Forums
When I loot with an alt, the items always go in the middle of my bag space with bagnon, its the only toon that does it. Moving the bags doesn't help nor
GitHub - obble/modui_classic: modui: for wow classic
Improve Your World of Warcraft (WoW) UI - ElvUI & Custom Setup - Arcane Intellect