Goblins might help starting Characters advance a little faster and move the game a long a little quicker. They also are found just about everywhere and I'd suggested putting 10 more in the Adventure deck, 5 in the City deck, and 5 in the Dungeon deck.
Other Goblins
The Goblin's growing influence is felt in other ways as well!
Goblin - Race
Players now can chose to be Goblins! Rather than has a Character Card called "Goblin" there is now a new type of card - "Race". Race cards are like Master Character cards in that they modify a base Character but Race cards are selected at the start of the game as Alternate Abilities. This allows a player to begin with a Goblin Assassin, Goblin Thief, etc.