It only sucked to you because you hate Sasuke and you need to face the realization that Kishimoto created this manga based on Naruto and Sasuke. They are both main protagonists and the manga story arcs will mainly involve them. You can't say for fact that Sasuke
will be out of chakra, you can only assume something that has yet to happen. Sasuke will not die because the manga has been based around Naruto retrieving him back and if he was to die the story plot would collapse. It wouldn't be logical for Kishimoto to make Naruto's character have only this undying desire to then have Sasuke die in the end. Look up emo and you will be surprised that Sasuke doesn't fit that label and haters are the ones who call him that out of ignorance. Please suppress that foul tongue of yours and if you have something vile to say about any characters might I advise you to keep it to yourself because it is very insolent to me and any other person that happens to come across your hateful/grotesque post.
Again saying things for a fact when they indeed are not. If you wanted to be taken seriously then cease in forming your words into an opinion rather than fact.
Karin was only able to come to the conclusions in this chapter only because of how Sasuke handled his
"strategies" against Danzou. Also, we cannot say for a fact that he was only informed on how to defeat him by Karin, when he has apparently had this particular strategy from the get go. In my opinion, I believe that you are incorrect and this is why take a look below:
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Even though he is fighting one of the people out of his vendetta, he was still able to think like the genius he is by canceling out the summonings powerful gusts with a katon jutsu which only grew through the wind thus destroying it in the process. This was done that way he wouldn't stay open even though Danzou created that gap in Susano'o. Even Madara acknowledged as he was quoted complimenting him for doing so.
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Karin indeed figured out Izanagi but before she could inform Sasuke, he interrupts her as he obviously had predetermined this without her help. Although, simply for assured confirmation, he asked Danzou flat out and the answer is then indeed confirmed. It just goes to show how Sasuke easily exposed Daznou's technique as he naively gave it away, his strategy was anything but a joke as it was the reason why he came to the same conclusion Karin made and how his brain maintained its intellect.
Well, don't you think that Kabuto could have his own priorities rather than only being a tool for Daznou to use?