On a related note: the Umberlee Temple also clearly suffers from cut content. It takes up a fairly large chunk of the map area, but it has only the most minor and easy to miss quest attached to it. It feels like the water ladies were originally meant to be a recruitable faction.
There's a plausible theory, that all three acts were supposed to have a different hag: green hag in act 1, night hag in act 2, and sea hag in act 3. I can't help but wonder if the original Umberlee quest was somehow tied to the cut sea hag.
