Gengars legacy as a top-tier ghost Pokmon and Mimikyus cult following contribute to this surge in demand
Final Act gets rid of a lot, and for decks that rely on rad, poison, energy, or experience counters this is a serious reset
Official descriptions note that Pals in the TCG "will utilize their own unique traits to lead you to victory," and since we see Grizzbolt's Partner Skill in action with its minigun, we can probably expect those abilities to be represented some way in the card game along with more traditional moves
While having multiple sheets is only a one time thing, it is true that having a single bonus sheet has recently become the norm for Magic releases
For just one mana more than Anointed Procession, you get the same effect, plus a bunch of loyalty abilities that make tokens, buff them up, and destroy opposing threats