Does the sugar-cinammon mixture have too much cinnamon?

It doesn't sound like too much cinnamon to me. It uses 2 Tbs. (1/8 cup) to 1/4 cup sugar so it's 2 parts sugar to 1 part cinnamon. Make it less if you're not that much of a fan of cinnamon. You could always add more cinnamon after you roll the first few or bake the first tray and taste one.