I have been working on 12 fractions grid layouts, and it would be convenient to read the number of fractions taken by each column inside the Grid editor.
Counting them and estimating how many we set as we slide through the editor is pretty tricky when dealing with a lot of fractions.
Oh on the same subject, another thing I am thinking about that could be of great help would be to see in the grid editor, the custom name that one gives to the columns in the navigator.
That would be great, especially when moving things around on various breakpoints.