I know they did a lot of playtesting and math to balance these out (there was a post on the math many months ago), so while it may not "seem" balanced to you, I'm pretty sure it works with the math and system assumptions, though I could be wrong.Even then it still doesn't seem equal to the other cleric archetypes.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.