Following your example I used this expression 'TextMorphForEditView allInstances collect: [ :ea | ea text]'.to get the text in all the TextMorphForEditView instances without have to Cmd-S them first..
In my case I need to know if the TextMorphForEditView belongs to a Workspace. Is there a message for checking if an object is a child object of a particular class further up the hierarchy,.something along the lines of: