Kakashi's copied thousand jutsus aren't much!
Kakashi gained his sharingan and MS thanks to Obito. Without him, Kakashi is pretty over-rated trash.
Let's say even if he has copied thousand jutsus, like they say "a Jack of thousand tricks, a master of none... "Quality over Quantity". That's the reason why he isn't using them, as not only it will not be effective against the people he is fighting, he will just waste his already limited chakra reserves
One S-rank jutsu like "Kirin" of Sasuke beats Kakashi's million D-rank jutsus :D
Also, why isn't Kakashi fainting like last time, or going blind because of his spamming of Kamui? Plot no jutsu at it best! :D
Please, I don't really hate Kakashi, but the guy is quite over-rated in my book, I mean he is low Kage or elite Jounin (more like Kage body guard's level), and shouldn't be able to fight toe-toe toe with people like Madara, Izuna, Sasuke, Itachi, Obito etc.
What do you think?