Hi this is my first post !!! Guys, I don't think that this is an asspull after all. My opinion is, just like the Indra and Ashura transmigration, Obito's soul can actually give Kakashi a temporary power-up. Like Hagoromo with Nardo and Sauce. And after they're finished with their role, the power-ups will be gone forever, in this case, Obito's Sharingan and Susanoo. Maybe Nardo and Sauce's power-ups too, since Hagoromo is a dead man and the power granted is only to seal his mother off. Technically Obito didn't transplant the eyes, he 'possessed' Kakashi. After all, you guys saw the conversation between him and Rin that he promised to come back. How the heck that he supposed to come back if he doesn't possess the Sharingan ? So for you guys who are ranting about the sudden power-up, chill out. Kishi will explain about it in the next 2-3 chapters. As for the PS, I think it is because Kakashi literally copied Madara's PS, although it is plausible because he's not there during the 5 kage fight with Edo Madara or maybe he copied Sauce's PS.