In the next version updated, there are going to be some adjustments to the battlefield missions released with Chains of Promathia.
The bulk of the difficulty adjustments are occuring in the Promyvion area, as well as the missions "Flames for the Dead" and "The Warrior's Path."
On top of that, special items used in these battlefields will have their Ex. property removed - allowing them to be placed for auction.
Finally, there's also going to be an experience point reward added for successfully completing a Chains of Promathia battlefield. The reward should be slightly less than what you would receive for ENM quests.