So I did about 6 matches of Feast last night on SCH and as someone who's not big into pvp, I had a lot of fun with it. It's really intense trying to heal and stay alive...it seemed like for me as SCH it comes down to use and conservation of aetherflow stacks for Lustrate (knowing when to kill the fairy as well). Once I have to stop moving and start hard casting heals, I'm in for a bad time.
I like the medal system too, a match can turn around in a hurry if one person picked up too many medals...makes for some exciting comebacks. The only drawback is that people are salty as hell in there, on only the second day. I had one battle where the dps and tank were at each other's throats the whole time, despite the fact that we won.