A couple of editor suggestions…
I'd enjoy being able to hide the Groups or Macros columns. I'd use it a lot. Conversely, I'd like the option to display the actions palette as a persistent sidebar or column in the editor window, rather than a drop down.
I'd find it very helpful to be able to customize the editor toolbar… Buttons to control the visibility of various panes, buttons for some of the Actions menu items.
Just some some thoughts.