In response to many player requests, we are planning to adjust the difficulty of the Chains of Promathia missions in the upcoming version update, as well as introduce a new experience point reward upon the completion of a mission battlefield.

Adjustments to Difficulty

Particularly challenging Chains of Promathia battlefields, such as those that appear in the Promyvion areas (Holla, Dem, Mea, Vahzl), and the missions "Flames for the Dead" and "The Warrior?s Path", will have their difficulty level toned down. These adjustments will include changes to monster level and placement.
We also hope that the following changes to items used specifically against Chains of Promathia enemies will encourage players to brave the dangers found in the mission battlefields.

-Rare/Ex Properties
The special items introduced for use against enemies found within the Chains of Promathia battlefields will have their "Ex" properties removed, allowing these items, such as psychoanima and mistmelt, to be put up for auction. Certain items will also have the "Rare" property removed, allowing players to carry multiples of the same item.

Experience Point Rewards

After changes made in the March 8 version update, players no longer lose experience when being KO?d within a Chains of Promathia mission battlefield. In the upcoming version update, players will also be rewarded with experience points (or limit points) upon the successful completion of a battlefield. The experience point reward will be slightly less than the amount received for ENM quests, but it will be possible for players to obtain this new reward once every Earth day.
These changes will provide a tangible benefit for those who have completed a Chains of Promathia battlefield and wish to aid other players with their first attempts.

source: http://www.playonline.com/pcd/topics/ff11us/detail/1839/detail.html