I see how it would work with simple content, such as your example.
My problem is with the flexability when using forms, file downloads, shopping carts, email, or other complex functionality, which this structure won't support.
I'll do some thinking on this one and see if it makes sense for us to create the includes functionality for users such as yourself.
I wouldn't mind setting up a phone call with you to show you how you could organize your site the way I suggest and demonstrate the advantages if you are up for it. If you are still sold on this technique while fully understanding the option I propose it would better convince me of the viability of the extension.
Send me an email to firstname.lastname@example.org with your phone number and I'll give you a call and discuss this further with you.