Quote from gojen
But didn't Nagato have to awaken his Rinnegan, just like Obito had to awaken his Sharingan? I don't think that he just had it.
Kakashi didn't have to awaken the Sharingan that was given to him, so I assume that Nagato wouldn't have had to awaken the Rinnegan if it was really given to him.
Ya but you have to remember Kakashi recieved his Sharingan in its active state so anything more is conjecture just have to wait and see.