Since Menace is all about combat, it makes sense that it would be at its best there.
If Vault 13 leaves the battlefield before its first chapter ability resolves, the target permanents won't be exiled at all
If you're lucky enough, it can stick around for its final chapter, hopefully winning you the game if you have an Ugin and a few other permanents lying around
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!)
You could build an aggressive deck that uses Bre as a card advantage engine to maintain pressure or go taller and focus on giving your biggest creatures lifelink and flying
I've blown up a table with Comet Storm when playing an old Borborygmos Enraged deck and it's definitely fun