After playing the Beta a while, I'm really frustrated by healing. Even my strongest heal, Flash Heal, barely heals for ~10% of the tank's health. On many pulls, I was having to spam Flash Heal nonstop just to keep the tank above 50%.
Are healing numbers tuned yet or...?
EDIT: After further research and testing, it seems that mob damage being too high was/is the problem, not healing being too low.
At least, as far as I could tell.