The only enjoyable and challenging thing as a healer in this game is healing as little as possible. In other words, it's only enjoyable when you're logging for dps, which isn't even technically allowed.

So long as the healers are designed this way, the game will never be as complex as its competitors, because it takes away one of the fundamentals of a boss encounter: fear of dying even when you execute the avoidable mechanics correctly. While savage certainly does do decent damage at min ilvl, it's still simple to outheal. The only difficulty comes from not overhealing, which comes at a cost of (usually) needed dps. But that's not complex healing itself.