What do you mean, "It's not even out, yet"?
Anyhow, just reading the rules, a fairly obvious expansion idea comes to mind: One time orders. You could have a unique order card for each faction, which could be used just once during the entire game, and give an appropriate substantial advantage. Here's a quick take on what that might look like -- though I'm sure these are nowhere close to balanced.
Uthuk unique order: Destroy! (#9): Exactly like Mobilize, but with a higher number. Having an extra double attack card available in your deck could be very useful.
Undead unique order: Arise! (#1) (I'm assuming you only get to use the supremacy bonus if the card's number is lower than, and not tied with, any other card you've played): The main part of this order allows a single activation/move, like with mobilize and conquer. Supremacy bonus: You get back any forces you lost in a battle triggered with this card's activation, plus you get 1 Reanimate for each enemy unit you destroyed.
Knights unique order: Alliance (#9): The Knights player may request an alliance with any other non-evil factions. If the allied players have six dragon runes, plus three for each alliance member beyond the first, then they jointly win the game.
Elves unique order: Peace (#1): Until the Elf player executes his next order card, no player may play an activation token onto any area containing an elf unit. Supremacy bonus: Receive benefits from all your controlled cities (as per the main Rally Support order), plus twice the number of influence tokens currently indicated on your dials.