so blizzard did a ninja nerf where they increased tanks dmg take by a lot. like 60-70%
i noticed this clearly as as a guardian druid (full pvp gear) got attacked by a ret(full pvp gear) i have a max survival spec and i still got kill in about 10sec. i did almost no dmg to him and he hit me with over 100k dmg with some attacks. if blizzard dont want tanks i worldpvp then just block tanks from useing wm on instead of doing ninja patches like this.
i have also found this video where a guy tests and shows that tanks really take a lot more dmg then before: