I don't disagree, but I probably would have been more agreeable to the game if they cared at all about what happened to the slaves. Killing the slavers felt like an excuse, even if I didn't particularly care for them, for obvious reasons.

So you know of her. My clan follow her tales closely, even named themselves after her. Clan Frandruil; followers of the hunt. [It's the first time he's openly named his clan, but Morrigan's interest does not make him uncomfortable. He feels more uncertain when he speaks to fellow Dalish, frankly.]

Yes. They were. Primarily, they followed the banks of the Serpentine River.