Oh yeah. Clemency with 1.5 sec Casttime would really be sooo overpowered. I could heal the entire Raid myself until...

...oh wait, I'm out of Mana after two Clemency? Can't heal again for ~6-7 GCD.
Clemency with 1.5 sec Casttime would be a great tool against Magical DMG and to WTF heal a DD/Heal/MT at 20% HP left.