I kept waiting for a scene where Atris would stop complaining about how "'the Exile betrayed her..." , realize how much she felt/feels for him, that his actions then were 'right', or at least see what he is doing now to correct the situation and actually help.
A romance sub-plot with her doesn't sound like a bad idea anyway.
Kreia actually had to tell her bluntly.
Would have been really nice to see her in combat as a party member, or at least in a cutscene. Atris as a character, I found, interesting.
On another note, plot revealing Atris as Sith, or at least somewhat corrupted by the Dark Side was not really a big surprise (probably not intended anyway) since her manner of tone at the Exile's trial and her reasoning are unlike what one would hear/expect from one on the Jedi Council.