I will argue, though, that what really killed the hype for Set Champs was the fact that the prize card, Mirabel, Family Gatherer, was and still is completely unplayable
For example, if Clive's Hideaway's hideaway ability is copied and two cards are exiled, you may cast both exiled cards without paying their mana costs (assuming you control four or more legendary creatures at that time.) Gogo's ability can copy any activated or triggered ability on the stack, not just one with targets
Especially in cases where cards are rated similarly elsewhere, this factor will favor the card thats doing something a bit more off the beaten path
Then with Audrey Ramirez, The Engineer, players will be able to ready the items theyve just played once theyve used them - so that they can use them again
I guess fans don't want to pollute their Final Fantasy decks with a yucky Fallout card