I think it's a large part of why "its the best deck in Magic".
Edit: Maybe also it's because there isn't 1 removal spell in the top 10 most played cards. A 20+ creature deck that ignores 4-6 cards in 60% of the field, a field where there are no removal spells in the top 10 most played cards.
Actually, Max's article is a devastating argument against the case for restricting Misstep. Restricting Misstep will just replace those slots with other cards that are bad against Shops, so restricting Misstep will have no net effect on Shops.
Restricting Misstep won't make Shops weaker in the metagame.
But it will make 1cc spells that are good against shops, that cost actual MTG mana playable. If bluu stew just players stuff 2 Flusters and a Pyro in their decks post skillstep restriction and still complain about losing to a bunch of 1 and 2 toughness creatures all hope is truly lost.