I just did the first two bosses to see , and they're definetely tough for now.
I'm running a meele team of feral with 2 resto. Healing is a mana sponge now.

First boss took me some time, as my meele team is nicely stacked around boss for his chain then insta 80k cleave.. I just had to be on the chain ASAP when it popped and move away. I moved a bit to avoid quakes too, they deal quite a bit of damage for undergeared toons. After that he was cake.

Second boss is alot harder for meele teams. But what I did was drag the boss to one of the adds, blocking the beam and burned the newly formed add down when it pops, move out of the way after it drops and kill the next add. Then finish the boss off. Quite easy once i figured it out. 2 adds up was a instant wipe. The whole beam thing makes no sence, it really doesn't look like you're in its way lol, it's far too high up for my toon to actually be in its way... glad someone noticed it lol.