Don't like Mission Control and miss Spaces!
I just upgraded to Lion, and am very disappointed with Mission Control. I am a spatially thinking person, and I loved the organization of my 6 Spaces, each with specifically assigned apps. I could write in one space, do spreadsheet work in another, have my mail in a third, iTunes in the fourth etc. And all along, I knew where each space was relative to any other. Additionally, combining Spaces with Expose, I could see all apps (and their windows) within each desktop space, open any app, or move it from one space to another.
In Mission Control, apps are assigned to different desktops without my control, and these desktops seem constantly reordered. Furthermore, when looking at Mission Control, it is impossible to see apps covered underneath other apps in all desktops besides the one currently in full view. Consequently, it is impossible to see all open apps and their windows at the same time, open them, or reorder them.
Mission Control has thus defeated the brilliant idea of Spaces, which created spatially ordered, potentially app-specific, desktops. From a neatly, spatially organized computer I now have an unordered and uncontrollable pile.
I see how Mission Control forces simple users to become more sophisticated. It is, however, at the cost of already more demainding users. I sincerely hope that Apple will make Spaces available again for people like me who rely on them for logical, spatial organization of their many computing tasks.