I’m used to the way the undo feature work in the Designer. Not too bad living with this.
BUT – my big gripe is that there is no undo function in the Editor, even if you stay on the same page! As soon as you click out of a text box, the content gets saved, but you can’t undo. My clients are used to Undo being an integral part of editing applications, but each new client I have to point out that this is one of the (several) limitations with the Editor.