Isn't EW basically the result of what decision we made in ShB? It would be silly to question our moves all the time once more when we decided in ShB to care about ourselves and to follow up on our own path.
Or what is that you mean with with "moral ambiguity" (in ShB). I think it was the logical conclusion to the story after what has happened in SB and ShB, especially if you consider that EW is the last expansion regarding that whole storyline and it should find closure instead of another multitude of doubts. (And considering what the enemy is in this expansion)