It was the ineffectiveness of the midgame Edict that was holding them back but being able to cleanly clear out the chaffy small dorks helps the Edict cards remain viable cube tools
Mirrodin was very cool and interesting, sure, but the colorless soup problem prevailed
Jinbe allows the player to develop two Characters in a single turn, Weevil sets up a difficult early-game matchup, and Moria serves as a draw engine
Note that like many other PKs, they have a ton of synergy of power-smashing effects that will kill pretty quickly
Remember that Nintendo owns a 32% stake in The Pokemon Company, with the other two portions going to Game Freak and Creatures
On top of this, you can exile a creature with Savior of Ollenbock from the battlefield or a graveyard whenever it trains