It looks like you are back to where you started.
Some Developers like switchboards and some like to develop their own system of navigation.
One idea is not to limit yourself to either one.
Remember these are only aids to navigating around your database application, so remember your users and their needs.
If your the only user, do what you like.
You could use local url links to navigate.
You could use a combo box that selects the object type, and another combo box that is updated based on the object type. Then a command button to open your object.
You could use a switchboard
You could use a master form.
You could use something no one's thought of.
You could use a combination of things.
One thing useful about the switchboard is that it make adding references to forms or reports or utilities easy.
If you don't have many forms, no problem, if you do, this may be an issue.
When all is said and done, you might decide to do it the old fashion way, and Navigat By The Stars
David I'm Your Huckleberry!