After trying a few times the 4 normal raids, I came to a conclusion:
you have given all the weight and responsibility to the healers.
Yes, a very noisy and -PARTLY right- group said healing was too easy (and I feel that too, in EW was a walk in the park), but now I say something different.
DPS IS TOO EASY, THEY DIE, fail every rotation and don't take any blame because there is not such a thing as a "dps check" in normal raid.
This is UNFAIR, everyone should be part of the victory and we don't have to win just because the healer is perfect and we have 4 zombies raising over and over until the boss die.