Good work! having some new starter decks is good. Surely, Penduluns are a must.
I, however, liked the card pool idea. Maybe player could receive a starter deck alike these, with some off element cards, AND have some cards in his pools, but not "sinergy" pack, I would prefer something that slightly presents the element, with a spell, a creature, and possibly 2 Penduluns. Death, for example, could be Poison and Vulture, Fire could be Fire Spirit and Fire Bolt (or Deflag).
If noobs start playing with 60 cards of several elements, lol, they will soon discover it doesnt work