It's a ceremony, dude.

It's not like delayed-blast heal. The spell takes 10 rounds to cast. It's like a little ceremony. -You know, chant some stuff, make some signs, whatever. 10 rounds is just 100 seconds, less than 2 minutes.

I've never seen a priest prepare a communion offering in 10 seconds. Those guys generally take about 5 minutes. Thus, I can imagine that healing someone might take as long as toast.

As for the energy thing, that's cool for a battle priest, but I can't really see the brother of charity whoopin' some ass before he blesses the soup kitchen.

In any case, check that email. This stuff has a home.