Just for clarification, I'm pasting the deck construction restrictions to be competing in the "budget" category.

Budget prizes are awarded to the highest placing decks without any of the following cards:
any "Power Nine", Bazaar of Baghdad, Mishra's Workshop or Library of Alexandria

The change from last year I can see is you can no longer run Library of Alexandria, but you can run Time Vault.

Just for clarification, I'm pasting the deck construction restrictions to be competing in the "budget" category.

Budget prizes are awarded to the highest placing decks without any of the following cards:
any "Power Nine", Bazaar of Baghdad, Mishra's Workshop or Library of Alexandria

The change from last year I can see is you can no longer run Library of Alexandria, but you can run Time Vault.