I'd love to see the rewards based on individual contribution to the fight. Generate a rating based on damage dealt and healing. If rating is within a certain range of the average for your alliance you get the current rewards. Below that range, get only wolf marks. Above the average range awards bonus exp and tomes.

This way those who are actively playing don't see any change to their gains, those who aren't pulling their weight are incentivized to try harder (but still get something if they're just not at that level yet), and those who are putting effort into doing their best are awarded accordingly.