[CAUTION!! 3.2 Spoilers!]
After participating in the Grand Melee (something that I found very fun) I ask for an optional 8-man Trial in the Dragon's Neck Colosseum of Ul'dah (the same place where we fought against Ultros and Typhoon), but this time against Pipin Tarupin and Raubahn Aldynn (a harder version than the Grand Melee one).
I think it would be a good idea, the fight was cool, and especially because there're few trials against XIV characters (we only have Rhitahtyn, King Mog, Vishap, and Ravana).
The reward? Pipin Tarupin's minion, or... Ul'dahn gear.