That's an interesting point. So here's what I'm wrestling with.
1. The actual Auran Empire, as used in play, followed the rules of a more conventional D&D-style game, because it evolved out of B/X. So therefore if I were to change it for publication it would be less genuinely based on actual play. I'm not sure how much of an issue that is.
2. I worry that, as the implied setting of the game, the Auran setting needs to adhere closely to the rules-as-written in the core, without tinkering with them too much. Dark Sun could tinker with D&D, but Forgotten Realms needed to apply the rules as written, so as to speak. (Or did it?)