Well first chapter said Kurama was strong enough to crumble mountains and start tsunamis with a swing of a tail, Yang Kurama alone sent 5 Bijuu back some distance with a roar, matched the combine tbb of 5 fully powered Bijuus and has a ton of reserves. A full Kurama Naruto would hold much more power and might have all his base stats increased (strength, speed, endurance, durability, ect) but this still leads the fact that Naruto still need to train with the power and master it. He only had incomplete training with KM, no training in BM and no training in BSM so he wouldn't know their full capabilities or limits. He only did what he did on the moment or with aid from Kurama.
I would like to see Naruto either switch with Kurama or they fight as one where Naruto and Kurama's fighting skill are combined. That would at least make up for Naruto's lack of training with the power and Kurama been alive for centuries so should be one of the most knowledgeable living thing around along with other Bijuus.