As a suggestion, it would be neat if from the Edit Data source->Entities list it was possible to edit (by drag/drop?) the ordering of the fields. That way the grid, add, edit pages would use this ordering when laying out pages as opposed to the default ordering in the db.
Following on from this, if the Outline view allowed drag/drop ordering of the rows that would speed up layout design . I know its possible to drag drop individual rows from the main edit area but I have found it a bit fiddly to select and cant do multiple rows