I also tend to put a lot of money on Intangibles, and Rieekan is one of those things... Yes, you may not get to use his effect throughout a game, and you may consider that wasted points in a purely mathematical standpoint.
But factor in what his potential will do to an opponent..
You're paying points in Psychological Warfare. Now you may have an opponent who is starting to second guess moves, because he might be looking at Suicidal Ships gunning right for him. With the way we plan orders at the start of the game, that may mean a three turn consideration for your opponent.
Those are worth points to me. An ability that makes my opponent sweat. Or at least take thoughts away from one path to defeating me.