Okay, let's rework the heck outta Grima and see if we can come up with something that looks more like an actual ring hero.
As of now players can pick Corrupted or Freed Theoden. Freed Theoden can pick 4 different upgrades each costing him health and speed. Corrupted Theoden sees Grima takes the lead with minor boosts to the abilities.
I quite like, personally, Freed Theoden as a Ring hero I think that the Team really captured the essence of Theoden. However I believe that Corrupted Theoden as a Ring Hero can be improved on. So let's go (I've included a link to an imgur album with pictures of corrupted theoden abilities as both normal and with the ring.
http://imgur.com/a/4PbH0 )
Grima WormtongueLeadership
The leadership change in the present version is very small, it goes from 15% attack and armor to 25% with a possible increased cost in fear resistance (not specified). I don't have much problems here, it fits lore wise but I would still push for a slight increase to 35-40%, I mean it's still the ring we're talking about, even if it doesn't fit lore wise.
Banishment to Exile
The only difference so far is that the skill seems to recharge faster when paired with the power of the ring. I'd like to propose a major change there. I propose that the damage dealt increases to 75% and the skill recharge to 50% BUT that whenever the hero comes too close to a castle/camp/outpost (not settlement) the bonus changes to a debuff/damage similar to Grima's man hindering their progress and attacking them. This would render the skill more attractive to the eye of the player and, I believe, would show better the power that grima has over the country once he accesses the ring.
Taxes
I don't see anything wrong there, makes sense. Minor change, maybe Grima would also place traitors around the farm that would make sure that the taxes are paid and also defend the farm? Just an idea.
Traitors
Also major change here. First as requested I think that the traitors should be made permanent, this could easily be explained by the increase control of minds that Grima gains with the ring, nearly as strong as ringless saruman. I also propose that they get the ability to be mounted like in 3.8.1 or given some upgrades since, under Grima's dominion, the whole country would work for them and supply them with weapons.
Retreat
For the retreat ability I say a small boost in the ability should make it more attractive to the player.
The idea is to make the idea of giving the ring to grima more attractive and also to expand and hypothesize a bit more on the Grima as a ring hero. It is also important to note that once Grima gets the ring it will be likely that he breaks away from Saruman's control. Anyway stuff to think about can't wait to hear from all of you.