...They want us to have a sympathetic voice for Shar in the party, and they want it there for us to deal with early.
As soon as we get more of the less morally compromised companions, I think her reveal might become a bigger deal for the player and the party, maybe
"Great minds" friend.
Yes considering what a large role it appears Shar will be playing in the narrative I have to assume they'll be making it pretty clear, but I think it needs to be told from the perspective of someone in the world, not from pseudo-scholarly perspective like from a historical book or cleric, or from an omniscient perspective like a lore dump cinematic, not to say we shouldn't have those. I think there's a way that we talk about Shar, that isn't how people in-universe would talk about her, most people in FR don't have access to the kind of material we do.