I don't think so. By adding it to the fermenter, you can add to your liking.
To me this is similiar to adding a Cinnamon stick to your hot tea, about the same flavor...
When I sampled it at 2 weeks, the All-Spice and Nutmeg were prominant, hardly any Cinnamon which is why I kicked it up a notch.
A buddy of mine brewed the same recipe, same day with me and he didn't change his from the base recipe and he said the same thing, Cinnamon was only a hit of aroma, very little flavor.
We just recently discovered the Fireball Cinnamon Whiskey and I thought, what the heck