As far as Iron Fist and Wanda being irrelavent... again, the actual books tell us they were needed. If can dislike that if you want, but that's what the actual books tell us.
Again, I realize some X-fans might want the story to be Scott being 100% right and the Avengers being completely unecessary, but honestly does anyone think marvel would tell that story? Of course not. It's a team up so obviously they're going to tell a story where both sides were right and both sides were needed. And that's what we got, even if some wish otherwise.