Mag dk would be in a great place if you didnt remove 20% block cost and actually gave us cinder dodge chance and coag blood. As it stands, there is no reason to play mag dk anymore. Good job.
Here is a thread that will give you lots of information about PTS changes in terms of PvE Tanking , especially about Block Cost changes . I expect fellow tanks to share results of their tests as well
I am tank, so ofc i dont like changes that nerf my char, but I also dont nessesery hate those changes. Running 3x block cost reduction glyph will pobably make no sense now, but maybe we could change t