There have been additional experience enhancements announced today, focusing on experience awarded for capturing enemy BOs, as well as Renown increases for healers!:

As the battle for the Warhammer world rages on, we continue to listen to your feedback and look for ways to improve the game. Among our highest priorities is making RvR as rewarding an experience as possible, and with that in mind, we are pleased to announce Phase IV of our ongoing Experience Enhancements. Today, as you may have read in the 1.0.4 Patch Notes, we have made the following changes to experience rewards:

•    The successful capture of an enemy battlefield objective now rewards the capturing players with experience.
•    In response to player feedback, the amount of renown earned from healing players has been increased.
better!

We've included this phase of experience enhancements in our forums.  You can also check it out at WAR Herald.