Simple, you don't click on the Mission Control icon on the dock. MC is one area that apple has to address, it fails completely more so when you have a lot of apps running, or use multiple monitors.
I use multiple monitors, multiple spaces and multiple apps with multiple windows (XCode being notorious on that last one) and Mission Control has yet to fail me.
App Expose is much better than the SL Expose I never used at all (what a mess it would make).
Frankly, different strokes for different folks. I find mission control very nice as it is.
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I don't use virtual desktops, I never really did with SL either
Ah there's your issue. Virtual desktops is the best way to organize a work flow into tasks. Been using them since the 90s. Mission Control is brilliant with virtual desktops.