I am not sure why this is even an argument. Chris Avellone himself perceives Revan to be much stronger than Jedi Exile. The novel made this official. Coincidence much?
Also, fans of KoTOR 2 are way too critical of the novel. They take character statements in KoTOR 2 as gospel but revelations in the novel are wrong?
What all of us should do is to try to connect the dots from multiple sources and see what we get.