Every problem with the current iteration of healers.

[DawnSolaria]

Lodi summed it up pretty well.

Too much scripted damage output, which leads to:
Not enough to heal. And a
Simple damage rotation which doesn't make up for it.

Which unless they change the 2.5 gcd it will be hard to implement consecutive spike aoe damage. I was thinking something along the lines of more mechanic that deals consistent aoe damage to the raid, ones that will oom healer unless they use all their skills properly. I do believe healers heal skills are generally decently designed, so if they refuse to improve dps rotation because they don't want healer to do 2 roles at once, then at least make healong harder/more interesting