The way I see it Sharingan are like Final Fantasy 7 Materia and Kakashi had like max level eyes. So when he got both all the abilities were already unlocked. Bring on the Slug Sage Mode for Sakura next chapter. Fuck it. Make it happen because this isn't as bad as other situations like when Dan was a regular guy and his Ghost traveled like 50 miles in less than a frame of a second to save Tsunade. Ghost power up is not something new. Minato and Kushina where inside Naruto and teach him some stuff, Hagoromo gave both Naruto and Sasuke new super eye and powers also. Perfect Susanoo though... I thought only Indra and his reincarnations where able to do that.