You can also kill The End using a sniper rifle the first time you see him in the game (right after emerging from The Sorrow's boss "fight"). You have to snipe him while he's sitting in the wheelchair before he's taken away.
I can't wait to see what Kojima puts out next, and I believe that Sony will allow him the freedom to do what he wants. Even if it isn't the most fun game in the world, there is a guarantee that it'll be wacky and challenge the general notion of what video games have become now. That's what makes it so exciting.
Because of the graphics/gameplay? Or the story? If it's the story, I think that's a good thing. It's a devastating critique of US foreign policy as it relates to extraordinary rendition, indefinite detention, black sites, etc. Except for the very end, there's nothing that happens in the game that the US army / CIA haven't already done.
I think it fits the style of the story more, and certainly it was well-received by players, but for me personally, I found it interminable. I watched a friend play MGS4, and its story was completely bonkers. Ground Zeroes literally made me sick to my stomach. I'm done with MGS and while I'll watch for what Kojima puts out next, I'm pretty nervous about it.