Well, I was wondering if the Item Buyer NPC could be fixed. It looks like a nice idea instead of the extra grinding for medals.
Also, I had an idea for pets. Maybe for the bigger ones, there could be an extra option when you click it to "Ride." And for the smaller pets, there could be an equipable pouch that you could carry them in. Of course, the extra option on them would be "Pouch" probably.
Finally, if you were a big character, you could both "Pouch" and "Ride" the dragons and bigger pets. And the itty-bitty sized characters could "Ride" the bats and smaller pets.