The minigame tiers will be adjusted for patch 1.04. Level 80s will have it's own tier.
PvP exp for participating and winning is in the works but I can't promise when this will go in. Quite a few other changes are in the works as well
Don't forget there is a new GUI for signing up in patch 1.04. This should make it easier to get games up and running.
Sounds good to me.