This goes beyond just graphical changes, any mechanics that’d you’d love to see get more fleshed out or quests get expanded? Does not have to be realistic!
I'm really annoyed that they never fixed the bug where detail columns (and thus their related sorting options) disappear from the inventory sometimes and you can only get them back by relaunching the game. Also the one where adding items to containers makes them disappear in the menu and the only way to get them back is to press the "take all" button.