Problem #2 It causes inventory problems
Instant-Win Cards The most important part of a Nadu Commander deck is the way to win the game
Elemental Spectacle Unlike the other new MTG cards from Dance of the Elements, the ceiling on Elemental Spectacle feels quite low
Being so expensive, Numot decks rely on a ton of early-game artifact-based ramp to run out their commander, then focus on wiping the board of lands with Armageddon and Impending Disaster and the like, locking the board down so no one can deal with your (honestly, middling) 6/6 commander
Decks like Humans and Elves can no longer compete in the format, as they are just too weak to Fury
Pro Tip If you develop a relationship with your local card vendor, you can ask them directly about their schedule