Alright after about 15 hours in the game I have noticed the one thing before anything else is the amount of times someone can get off Revenge. People have mentioned that there should be a reward for blocking multiple attackers and I agree. However I do not think revenge should be able to be activated over and over. The following suggestions could help curb some of the abuse of revenge

Make:
Revenge a Feat that has a cool down
Make it so when you use revenge once during a life you can not use it again ( or with a timer of 3-4 mins )
Disable it completely.

I have had multiple 1 vs 1 fights where when they were almost dead they revenged. Backing off and waiting for the revenge to fall, taking him down again to almost 0 life then another revenge. I have had someone revenge 3 times during a 1v1. It's bull to overpowered

Just my two cents, let people flame. * Hands a match *