M.P.
The way that I make cinnamon crisps out of pie dough is to just sprinkle cinnamon sugar over the pieces as they are left after cutting off the extra. I don't add butter and I don't roll up the dough. I do cut large pieces into smaller ones.
The reason I use the dough as it is is that the dough will get tough the more you handle it.
To make cinnamon sugar mix equal parts sugar and cinnamon. Or you can sprinkle on the sugar and then the cinnamon.