I don't think they'll completely ex-out Rinoa. Did they give Squall any of Seifer's moves. I can't remember.

Seifer's moves include No Mercy, Demon Spin, and Odin Killer and I don't remember if he had any more. For those who never found Odin, Odin Killer is a cutscene in which Odin comes to your rescue (assuming you've earned him through the Odin dungeon) and Seifer slices him in half. Yes, I said that correctly: SEIFER sliced ODIN in HALF.