Any conversation I've had with Palmer hasn't suggested that he's particularly concerned about how Amanda is coming across now, vs. the earlier game. At most there have been suggestions that this is in character for her age, but usually it's just a 'wait and play the later chapters' as if some great revelation was coming that would explain everything but lol, no, it's literally not even considering that an untrustworthy person would lie, like WTF.
So no, I don't think he actually anticipated this reaction.