Yeah I have the same experience. This is one of the first dungeons where dodging and CC is so critical. The less the healer has to heal, the better for the team longevity. Not to mention another common complaint about the dragon breath is that the square is not accurate either that or lag, I've heard many reports of people stepping out of the area and still gets hit. My temporary solution for this "lag" issue is to continuously circle around the boss, as annoying as this may be for lancers and monks, but since you register as already mid-motion you tend to dodge those nasty toxic spews and dragon breaths a LOT better.