1) Naruto doesnot have control over his speed, he needs more training- remember its been at most days since he got KCM
2) Naruto has never blitzed with shadow clones out, and when he was fighting Itachi naruto split his chakra 12 ways, so obviously he wasnot able to blitz, also saying things like itachi/obito/madara have "normal" speed is nonsense, they are fast just not comparable to Minato's speed like Naruto is.
truthfully, Naruto doesnot need speed, never has to be op- I don't know why kishi made Naruto so fast, only to not showcase it. I mean it kinda makes sense, whats the point in using your chakra to blitz the juubi, if your attacks arenot strong enough to hurt it???