I don't use foundation. They are right that bees will make honey comb pretty darn thick. Some in fact will intentionally take a frame out of their supers and let them go with it. Since I don't use foundation my bees have, as has been said, drawn out scrawny comb between two fat pudgers. I just don't care much. They are drawing out comb and filling it with honey. I extract them all and trim down the combs.
My suggestion is do what you think is right. I essentially do as acebird said. I put drawn comb on then checkerboard when they need more space.