It should not make much differnece at all. Your bittering hops have long been in your beer and you finishing hops have done there job. If you want more hop aroma, then dry hop in your secondary
Primary 1: Oatmeal Coffee Stout
Secondary: American Mild IPA
Keg 1: English Bitter
Next up: Double IPA for friend, Kolsch, Graff, American Wheat, Dunkleweizen.