Its important to use what fits in your decks the most, but these cards will hopefully assist you in your upcoming matches
People had realized that the stuffed animals were just that, stuffed animals, and were unlikely to hold any value
Can Banding Stop Trample
Almost all of my own deck creations include four copies of 1) Chatter of the Squirrel, because it's cheap and fast
Lets demonstrate this by taking a look at a fairly average Sealed deck I recently played that had 17 lands: Why is this deck playing 17 lands rather than, say, 16 lands (-1 Forest, +1 Arrogant Poet) or 18 lands (-1 Tenured Inkcaster, +1 Swamp)
They are playable right out of the box and while they benefit from upgrades, they aren't necessary for them to function, unlike other certain Precons