Sigh.... for you not to understand the chapter and call it a buttpull.... read it tomorrow when you aren't thinking about butt PLEASE. Obito and Kakashi are still connected it was a transfusion, like you do with blood, except it's temporary and Obi to is working together with Kakashi. This is what I mean when I call Naruto fans 10 year olds. If you can't see the tribute to kakashi and Obitos characters' then....oh well. He's been his friends eyes for the most part of the story, let alone with one eye. Now they both can see the future. Do you even read people. I give up on defending you guys, this is sad
1. It was before heavily implied you needed EMS
2. Kakashi could barely handle one Sharingan. Even while used to a 3 Tomoe for years, heavy use caused him to be hospitalized for 3 days.
3. Using Kamui for the first couple times made him stumble and ravaged his body, even after one use
4. It took Sasuke a short while to access his Susano'o, at least a few weeks, but Kakashi has it after a few pages with no experience, and he stabilizes it and perfects it instantly
5. Kakashi is a non-Uchiha
6. Techniques that didn't particularly graze at your stamina gave him trouble, even after using it for a bit. Now, he's able to use a technique that takes a tremendous drain on life force, causing pain that "feels like every cell hurts", but he's handling that just fine
7. One Sharingan drained him, but now he's wielding two Mangekyo Sharingan without any seeming problem
The symbolism Kishi may be trying to put behind it is good, Kakashi and Obito will always work together, the execution, the medium of this symbolism, is utter shit. It makes no sense, contradicts many things Kishi himself previously established, and all in all desecrates what this chapter could have been, and pretty much the series' current status. You're just in denial.