Ahh....it's copied after a steelhead fly. That explains the marabou only. Steelhead flies are usually meant to be dead drifted or swung in current, and for those cases the marabou alone would be just fine for imparting life to the pattern. But pike flies require action to be imparted upon them by the angler, and the pattern you have here is a puffball that will have very little in the way of action, regardless of how bulky it is.
If you do add a rabbit strip tail, it will become a Bouface, which is a very successful pike pattern. Form follows function, and vice versa.