We could use a few more bulk editing tools in PHPMaker. The simplest being the ability to search for a field across all tables, and make the same change to all of them.
For example, I just added a User ID field to all my tables to enable Advanced Security. You would of course expect these to be hidden by default (that's another feature request) but here I am clicking through every table in the database to find this one user id field, and untick a dozen checkboxes to make it hidden.
This would also be super helpful for adding lookup tables to every instance of a commonly used field such as PersonID, or for increasing the size of every *Note field.
This would also help with hiding the ID columns.
This would also be great for setting all date fields to use the date picker.