Since Menace is all about combat, it makes sense that it would be at its best there.
Not only are there are a whole slew of powerful rares and mythics, but were seeing cards that might normally be mythic pushed down to rare (like Shalai, Voice of Plenty) and rares pushed down to uncommon (like all of the non-Rona multicolor uncommon legendsjust look at all of that text on Garna!)
Channel lets you pay life to generate a huge burst of mana, and then Fireball turns that mana into lethal damage in one shot
If Vault 13 leaves the battlefield before its first chapter ability resolves, the target permanents won't be exiled at all
If you like having the best creatures at the table at all times, then youll love playing midrange decks
While changes to older, non-rotating formats are fairly common, the banning of cards in Standard is incredibly rare, and Wizards does its best to avoid them