I think most people add too many spices in the first place. But you're going to need a few months even if you don't add any!
Do it - worst case scenario it will be fantastic next xmas!
In Process - Russian Imperial Stout, Nelson Sauvin Rye IPA, Mild No.3
In Kegs - Barley Wine, Apfelwein, Wild BlackBerry Wheat, Coffee Oatmeal Porter
Gone - so many :(