I dont like the way that costs scale, especially for a monstrosity ability
Almost all of these new cards synergize well together, which is really cool to see in a Precon
(My Equinaut Deck is a deck based around Equilibrium and Fleetfoot Panther that plays and replays creatures with self-bounce triggers to abuse various triggers like Aura Shards, the bounce trigger, or tap them before they had back with Opposition, and so forth)
You need many creatures that mostly impact the board at any time, which is not something that you necessarily get with your Loaming Shaman or Cloudchaser Eagle
8 Meltan A Greedy Steel-type Meltan is a strange little Pokemon who doesnt want to share its Energy
Most importantly, you can find cards that seem to have been heaven-sent for your strange little deck that are so oddly specific to your commander they cost literal pennies to pick up