What happened with the Exile? s/he had no character in the game and her only real purpose in the new game is to remind everyone of the less good sequel. You like KOTOR2 fine, but it didn't get a sequel.
What you seem to forget is that Meetra Surik had canon abilities and skills that Drew threw out the window and turned her into a sidekick. A Robin to his Batman. Except he made the Robin into someone who can't do anything for herself and made tried to make the Batman the be all end all of Star Wars.
Side-note: The REAL Batman would kick Revan's behind