ok, to be honest, afffliction is smooth right now, but i prefered MoP Destro and Demo. Somehow i cannot remember affliction in MoP anymore, probably was overshadowed by the 2 other specs and their design overhauls.
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uhm? Shadows new design was pretty good in MoP. It was smooth and got realy good survival abilities useful in pvp. Void shift was baseline and there was still spectral guise that mini vanish and angelic feathers, devouring plague as a burst dot and so on.
I did not even notice shadows in cataclysm, i saw them more in wrath raids when playing my affliction/destro lock. That time when you played affliction in 25 raids and destro in 10man raids.