Yes and no. Compared to the amount of maxHP players currently have, all healers still heal too much with compareable gear, especially when they are statted full wisdom. That rofl is too easy just makes it worse.
W can't say healers heal too much until we get harder ini. RoFL healing:
- 1 boss focus on tank, because DDs don't get any dmg,
- 2 boss focus on tank and sometimes heal DDs which forgot to run away from the circles,
- 3 boss full focus on tank,
- 4 boss full dps,
- 5 boss sometimes heal tank and full dps.
Wait with nerfs.
....and exactly stuff like that shouldnt be even remotely possible. 
This perfectly shows that healers are too strong.
Also the skill itself is too strong imo. Too much range, too much heal, too low CD and too long HoT duration.
Remember that this class has Holy Candle AND Blood Arrow to increase its healoutput even further.
This shows only Curing Shot deserves nerf because it really heals too much and it's not because of range or CD, it's because of healing. Holy Candle is ok but Blood Arrow is waste of HP (11% HP per second with both buffs isn't worth it).