You forget he also had to use Curse seal level 2 with his fire Jutsu.What?! You smoking something, read the manga again, sasuke used the amaterasus heat to better kirins lightning but it´s a jutsu he´s worked on by himself and can use as long as there are thunder clouds which he can create using fire-style jutsu.
The reason Minato said to Kakashi that he can´t use the technique was because he was going too fast and saw everything around him in tunnel vision but naruto has never had that problem and he´s somewhere around as fast as sasuke but you don´t see him having the same problem kakashi had as a kid, don´t say it´s different techniques cuz when naruto and sasuke are clashing, i´m sure they are running at the same speed.
He can still use the chidori and all its variants(which doesn´t require speed even though that´s not a problem).