i wouldnt really say that naruto isnt matured yet. From his expressions and character he may resemble still a kid but deep within he is a full grown man who does understand his responsibilities and duties . He can make fine decissions too. He is just a bit funny annd outgoing u know.I'll be fine with it. What is there to be so disappointed about anyway? Its not as if Naruto's dream is being taken away from him forever.
Naruto WILL be the Hokage one day, just a few months/years later that's all.
And tbf, I don't think Naruto is at the required maturity level to lead a village on his own. Give him time to mature and groom him to the role.
And as for the question i ll really be disappointed if that happens.umm well u know the whole plot is on naruto how a simple child who doesnt give up on his dream of becoming greatest hokage and being aknowledged by everyone as a true selfless hero.
And i think kishi wouldnt really destroy this plot would he?