Finishing jutsu? So was the original rasengan and the oodama rasengan as well. Naruto doesn't have any mid battle or what I refer to as supplemental techniques that has been the problem from the very beginning and it isn't going to change. Besides if your argument is that it would make sense, then you are way off because this is Naruto we are talking about here. When it comes to him fighting, things don't have to make sense.