Some small suggestions:
- Make all the tokens account-wide.
- Add some fast travel option between the different festival areas (like the horse racing in Bree, Duillond, the party tree).
- Add the possibility to trade the festival tokens to marks (if you already got all the cosmetics etc.).
- Turn the multi use items (like Flower Petals, Rotten Fruit and fireworks) to skills.
- Add some generic reward to the festival quests (like Bounder's Tokens).
- Add festival quests to high-level areas. Maybe even to some instances to encourage working together with other players. For example: get some creepy item from Sambrog to add it to the Haunted Burrow.