Like others have said before, the ability itself is great. The requirement of at least one Lily is not.

And be careful what you ask for, because the second lilies supercharge most of your spells if you have 3, you're going to feel the need to waste 3 GCD on heals you probably don't need in order to get that supercharged effect.

I do think Lilies are stupidly underwhelming (lower CD is about as boring as you can get for a special ability), but I'd prefer them to not make an even worse decision and make us heal 3 full times before getting our full effects.