My opinion is that Solas was BOUND to Mythal and only released in the good ending. I know the writers have said that Solas needed past (Mythal), present (Rook) and future (Lavellan) to align to show him a new path. But, Solas' reaction in Inquisition seems more literal than hyperbole when an Inquisitor drinks from the Well of Sorrows and binds themselves to Mythal.
"You are Mythal’s creature now. Everything you do, whether you know it or not, will be for her. You have given up a part of yourself."
I don't know how it could be interpreted differently, and i wonder if Solas knows this, because HE was bound to Mythal and could not stop his plan to tear down the veil UNTIL she released him from his duty.












