Ok, I was recently playing a game as an Empire race and I conqoured a city that had the bonus ally as an Ogre.  I was pretty excited about getting this then I realized my faction was not allowed to use this.

Talk about a downer.

So, I was thinking why can't my section use them.  Why not make it so they will fight for you but have a better chance of turning against you in tactical combat?  The more evil/good they are depending on your faction the higher chance they will turn on you.

Any thoughts on this??