But caring for Merrill isn't really part of the bargain, only letting her come to Kirkwall with you, and even that is a personal request on Marethari's part. Flemeth asked you to take the amulet and complete the required ritual.

Hm, maybe a warrior with templar spec (although how could Hawke learn templar skills?) could believe they can watch over both apostates... Playing a devout Andrastian isn't difficult, hell, ANDERS is a devout Andrastian. Playing someone who is consistent in their belief in the system AND doesn't get disillusioned over the course of the game, on the other hand... Argh.