One thing that hasn't been said here is that the devs have said multiple times in the past that changes are always based on evidence of a problem demonstrated by at least 2 of player feedback, data and their judgment and experience. For them to change deathmark, it is not JUST a handful of people complaining here. It is a combination of people complaining here PLUS (probably) the devs seeing that deathmark was being exploited in an unhealthy way. If it is true that a ridiculous number of people were putting a fully traited Deathknight at the front of their GW defence teams, then they have the data to see that. Any individual player sees a maximum of 5 GW battles a day, but the devs have the eye in the sky and can see the larger trends.