Playing my shadowpriest at level 70 now for a few weeks. In general I like it (for PvE, less for PvP). Doing great damage in 5-mans.
But... I'm getting SO tired of being unwanted in harder heroics due to the lack of CC, especially heroic MgT. Every day the same: no way to find a pug, due to the lack of CC. (Mainly thinking of 3rd boss, ofc.)
Since Blizz is saying they don't want any classes absolutely necessary in parties/raids in WotLK, I really hope they also gonna fix the problem of classes being absolutely unwanted.
/end rant