Almost all the champs in that bg are 70+. There are some overly cheap mirefolk, but that deck is not a good example of it.
My deck is still way cheap considering the amount of range and abilities. It just gets more ridiculous if u start running Pirahnids aswell. Mirefolk go from being over costed and a bit meh to OP. Im sad that they're seeing so much play, everyone on the mirefolk hype train. Theyll inevitably get nerfed now. I do think that the nora cost reductions to Arcanist and Songmaster could have been toned down a little. They needed some cost adjustments but maybe not that much adjustment. Arcanist is nuts for her cost.