So in my example I was not using Mission Control to select the exact window that I wanted.... I was just using it to select the application. So basically, I was using it as a fast application switcher. Here's my workflow if I am in Safari and want to switch to one of the three finder windows I have open....The problem is that you can't actually find the specific window you are looking for in Mission Control because the windows cover each other up and spreading them doesn't uncover them if you have more than 3 windows. App Expose isn't a substitute because it takes you out of mission control and now you can't move you windows to a new space.
If mission control actually spread the windows out then it would be a subsitute for the Expose/Spaces of 10.5,10.6. But it doesn't spread the windows apart enough to actually see content. Try finding a specific set of finder windows out of 10 in mission control and moving them to a new space. It is not possible without a lot of headache.
Three fingers up --> Immediately click on the first "Finder" thing I see... (I don't care what window it is) --> During the animation that brings me back to the Desktop do three fingers down --> Boom. I now only see three isolated Finder windows and I can easily pick the window I desire.
Think that takes longer that doing normal expose and searching through all of the windows? I suggest you really try it. Because for me it is easily just as fast if not faster.