It would be AWESOME if Illustrator had a clip tray feature. Instead of a basic copy/paste, if there were a way to pull up my last 5-10 copied items it would speed up some of my design process. I provide a lot of iterations of designs and this would save a lot of back and forth. Basically the same idea as the clip tray in your phone, but for the Adobe design suite. Even better it came with a keyboard shortcut that could pop up and automatically close the clip tray once you've selected.