When I ran Fading Suns, I decided that I was displeased with the rules. Not only were they another set of combat rules for my players to learn, they have some serious issues for my tastes. They rely on a single die roll for action resolution, yielding a much higher variance than die pool systems, and an ostensibly competent character actually has an unreasonably high chance of failing at tasks that should be simple going by the rules as written.
Some people dislike the dice-rolling and large quantity of charms involved in the mechanics for Exalted. To that end, I have produced a set of simple, abstract rules for Exalted that draw heavily on the mechanics of Nobilis. My version builds upon a rough outline proposed by Four Willows Weeping. I feel they are particularly well-suited for games or scenes running during the nebulous and mythical First Age.