They draw lessons from Magics 26 years of designing charms, build in newer staple effects that might not have been in vogue or even existed in Planeshift or Alara, and are updated for a modern, slightly more powerful Magic
Jolly Gerbils makes that equation a lot simpler -- you should just always gift, because you're going to come out ahead and get a more powerful version of the card
Make sure you have enough lands and some utility lands to assist you
Three quarters of team Wargamer spent yesterday evening playing Bloomburrow sealed on MTG Arena, and theory-crafting new MTG Arena decks based around mice, rats, and bats
Also, I now want to pumpkin canoe race : ) That sounds delightful
And with all the options to fill your favorite kindred deck, what if there was a way to just bring out any of the above for free