Cliftonc76 -- It's a good exercise to think before posting. You shoiuld learn to do that a little better. Think about what your post assumes and then consider whether your solution really makes any sense whatsoever.
Think about it. If the solution you propose is that simple, we wouldn't have a forum post about it. You wouldn't see articles about how badly Lion messed up with mission control.
The feature everyone wants back is the "All Windows" feature. The feature you are referring to is "Applications Window." When you use three finger swipe or Control F3, you are activating the "Applications Window."
What that means is this. You will be able to see each window in the application you selected. That means, if you have 5 Safari windows open, 1 mail app open, 3 word documents open and iTunes open, you will only be able to see each window within the application you select.
For example, if you're on Safari, when you use three finger swipe or F3, you get to see each Safari window. That is already available through a hot corner. This forum post has nothing to do with that feature.
What this forum post is about is bringing back the "All Windows" feature that Apple deleted in Lion. The "All Windows" feature would allow you to see all open windows at once. That would mean seeing the 5 Safari Windows, the 2 Mail Windows open, the 3 word docs, the 2 excell files and iTunes.
That feature was available in Leopard and Snow Leopard and deleted in Lion.
But those who think before they speak would have known that before even posting your brilliant idea. Why? Becuase they would realize that this many people wouldn't be so upset about Apple doing away with a feature if that feature still existed. You wouldn't have all of these articles on it and this forum post wouldn't exist. Think before you post....