During the Sun & Moon era, we saw spread attacks like Tapu Kokos Flying Flip and Weezings Splattering Sludge have enormous success, but these effects have dropped off since the Sword & Shield era for good reason
However, if an effect causes the opponent's deck to shuffle, you may have just weighed it down with one card that (by this point in the game) could be a dead card if they draw it, decreasing (ever so slightly) the odds of them getting the cards they need
The 100-card deck has 25 brand-new MTG commanders and two Legendary Creature Traditional Foil cards
Lorwyn Eclipsed is the lowest entry price, Bloomburrow is the most approachable casual theme, and Universes Beyond decks are strong if you already love Final Fantasy, The Lord of the Rings, or TMNT
As such, players want to play against decks of similar power levels, as opposed to everyone bringing a deck to simply win with