He was making Naruto do all the work and tire himself out for the current fight. Naruto's fought like 10 fights with hardly any breaks, aside from that time he got healed and the time he kinda died. Dat stamina!!
i knew it or mayb he was still getting used to the eye but either way he wasnt showing his true strength. he was only using soosano and his s/t. but now hes about to unleash the rinnegans power in conjuction with that, shits about to get real....