From my co-op session with a friend who has never played the game (or any larian games before) i noticed that he had a lot of uneccesary trouble with the UI for trading. The X to close the trading window is so hidden in a corner and blends in due to colour choice that he actually had to ask me the first time how to close the window.
I think this could be easily fixed by changing the colouring of the X box to something that stands out more to just improve the usability for new players a bit.
