Healing get harder?

[Shai]

In my opinion it depends on the tank. I've had tanks where I can easily dps, and others where I spam heal to just survive.

Absolutely this. Don't be fooled into thinking the [entire] burden is on you. There is a lot of bad tanking going around.

It was the same when HW launched. We will have new tomes and higher iLv gear in a week.
Even the bad tanks will not get hit like trucks for too much longer.