Would be nice to have a list of all broken formulas in a doc.
Sometimes you delete columns from tables etc and don’t remember that they are used in formulas throughout your doc. So some of your formulas become broken, but as far as I know the only way to find broken formulas is to go look at every column / canvas formulas in your doc.
Maybe that list can be in a Doc Map?
Also columns with broken formulas can be marked red in Table Options → Columns list.