I suppose it's not practicable given an interest in keeping code streamlined, and given all the different ways people can use a program, but it would be nice if every major change to the GUI came with two things. First, with an option to use the classic or the new, preferably by toggling, and second, with a pdf showing the many ways it can speed up common tasks, the many ways it can slow other common tasks down, and some ways to work around the latter. I would think the smart users/testers at ESRI have already explored the benefits/detriments/workarounds before deciding to include any change in a new version.