Not sure if there is a more generic suggestion open - but I really could use a shortcut just for the 'Edit text on Page' functionality. I'm using Orion for making user's guides and need to edit text on pages here and there (lovely feature by the way). Turning the feature on and off via menu is quite burdensome in the long run.
Like said, when taking screenshots of web pages, sometimes the text needs to be edited e.g. to anonymize some stuff. Hopping on and off with the text edit feature currently only available through the menu instead of keyboard shortcut.