Add a separate dialog to display and enter hide-when formulas to improve visibility and access in designer; and/or add shading to indicate where hide formulas exist, as is done with pass-thru HTML.
Make a STOP button next to the Open button that does exactly what Ctrl+Break does. Right now, that's just the super-secret keystroke for power users only.
UPDATE: Just to clarify, there IS a Stop button in the toolbar today. But it's not useful, because when your client is in ...