I liked 8vs8 in the old pvp eventhough it was most of the time some clusterfuck, but with the current skills it is not so much a good choice even. Some classes like drg/mch will have insane aoe burst damage(most other dps won't have the ability to aoe), while healers don't have aoe heals to compensate. This will be very unbalanced even though it's just a fun mode. Well, that is the overall problem with this PvP, it has not enough depth so that you could adjust your gameplay depending on the modes. It is somewhat balanced for feast 4vs4, doesn't mean that it is very entertaining to play. The boundaries or limits of what is possible are very small, there is not much room for dynamic/suprising elements.