Last week I highlighted an Azorius deck from a Standard league that featured a bunch of Torrential Gearhulk as a deck that could break out at the Pro Tour. Torrential Gearhulk had a great weekend, as did blue and white cards on the whole, though the 9-1 decks from the Pro Tour ended up looking like this:
These decks look to follow the old Mike Flores' rule of "play as many of the best cards in the same deck as you can". Even if your exact configuration is wrong, the cards featured here offer a ton of individual abstract power:
I've seen it suggested that the popularity of Aetherworks Marvel likely contributed to this deck's success, as Spell Queller is exactly where you want to be against those decks. They have a lot of answers to spells, but fewer ways to deal with creatures.
My first impression is that these being the only 9-1 decks is more of an indicator of the Pro Tour metagame than of this sort of strategy's place going forward, though the data here most certainly should lead you to put these decks in your gauntlet. These decks have reasonable answers and very solid threats, so it's very hard to imagine that they will ever be objectively bad, and given the diversity of the Top 8 from the Pro Tour I am not expecting that a "best deck" will be discovered at least for a short while.