Last year we had quite a few threads asking who are the best three players across "the three" and the general consensus was that it varies depending on form, oppositioin, fitness, upcoming fixtures etc. I would hope that our signings this year will allow us to extend this to other parts of the pitch. It's time we stopped thinking about a "best eleven". Signing Wanyama gives us options and puts pressure on a number of positions which can only be a good thing.
Maybe you are right. I'm not a fan of squad rotation for the sake of it which is what some teams appear to do. But if its applied thoughtfully, looking at the opposition, the conditions etc, then it has its place.