Cut his hair. Sea urchin hair is part of the Naruto character, the more personality and physical traits you take away from Naruto, the less he is that character and the more he becomes an OC. Besides, the "long hair is cool" trope is annoying and overused.
Author's response
I make no promises on Naruto's hair. i haven't decided if I want to cut it yet or keep it long.
Time will tell, sorry