You can't expect gradual power growth in a story that tiers progress chapter by chapter.
When Kishi puts a powerful opponent, he also needs to power up his/her opponent in order to keep it up.
Sasuke went from getting stomped by waterclone to owning 10 of them in 1 second at 1 week.
Lee went from tripping over opening 1st gate to using and shrugging it off casually in 1 month when he was out of surgery.
Gai's Asakujaku he used against 30% Kisame was several meters vide while in war arc it was bijuu sized.
Chidori/Raikiri is suppose to be a non-spammable tech but Sasuke uses it like a kunai.
Asuma/Zabuza/Kakashi/Gai have been portrayted as "elite jounins" but now Kakashi and Gai are out of their league.
Do you get what am i saying..? Not just kamui, everything in NV scales up. Because Sasuke needed to be relevant in Zabuza fight, Lee needed to do something against Kimimaro, Gai's Asakujaku needed to went against 6 tails, Sasuke needs to spam lightning techs to take dwon Deidara, Kakashi and Gai are suppose to be able to fight with bijuus and Obito.