The difference in tank damage received in old and new content can very easily be seen by looking at Golbez and Zurvan.

- Golbez does a hefty amount of tank damage during his busters, but the rest of the time, his autoattacks are non-threatening.
- Zurvan can easily destroy a tank that's not paying attention, his autos hit hard, his untelegraphed cleave hits hard, his tankbuster also hits hard. It's very common to see a tank die in unreal, because a lot of the newer tank and healer players aren't prepared for the amount of damage he can do.

It's also quite unfortunate that they reduced tank damage via 2 ways in ShB+EW.
- Removal of crit damage from bosses, removal of non-telegraphed cleaves and reduction of tank damage received from autos.
- Giving tanks massive self-healing and a very potent short CD.

I think the 2 points listed above are actually SE's way of making tanking more approachable, but it also damaged the healer role because tanks are taking a lot less damage than before.