No, in fact it is in a Phase I recipe in the book.
The best balsamic vinegars have nothing else added to them - only the grapes. Lesser ones will add brown sugar or caramel to mimic the sweetness of the better ones. However, I doubt that you will be drinking cups of the stuff so buy what you can afford.
Change isnít easy. But if you donít change, you stay the same, and whereís the fun in that?