Hmm. Carth and the Captain of the Harbinger have a conversation that seems to imply that Carth is aware of The Exile's presence on the ship. Atris had leaked word that The Exile had returned to Republic space, yes? So Sion, Carth, and Kreia were all looking for The Exile just prior to the game start.
Still; what was Kreia's plan? The Exile had been stripped of the Force (as had she, right?). How was The Exile supposed to stop the Sith Triumvirate in that condition?
Back to Malachor. What do the game files reveal of the sequence of events that was supposed to happen after The Battle of Telos?