There should be an auto-sell feature. It could be really simple like selling everything that is below a certain rarity, or more complicated like actually setting the statistics to a minimum of what you want to keep. I say this only because I have accidentally sold too many rare items.
I have a Muffin on my team and their are Merby and Sirena on the other team, and the Muffin are so short that the Merby and Sirena can't even attack them. Is it meant to be like that?
Family eat twice as much food on hardcore. It was the original difficulty setting, but probably too hard for the mass market