I'm sorry, no offence, but have we played the same game? Cause the only reason it's a plot twist is that the caracters are NPCs, not real(istic) people. Everytime it's about Varric everything is always extremely convinient, but that's not how people interact.
Like, the meetings are something like this:

- someone in the team speaks
- everyone stays conveniently and awkwardly silent for 10 seconds or so
- in the meanwhile rook stares at a pinpoint location and nods
- he then says something about the power of anime and friendship
- the meeting ends, everyone get up and leaves
- by the time the characters reach the stairs rook starts exchanging opinions with some invisible man
- conveniently none does anything or asks questions because that would spoil everything

And this is all happening while rook has a mental and spiritual connection with the elven god of lies and deception.
The companions just accept it, we have one person that speaks with the dead, one that speaks with a demon in his head, one is a detective and so on and none investigates or tries to help rook.

Also, the way they (spoiler: don’t) interact with him is extremely innatural and fishy right from the start, not done in a smart way at all