For now, I can't say anything about my contributions to the sets I helped work on - but I was very happy to be able to contribute to those mechanical discussions, and I look forward to seeing them released to the public one day.
Sealed Order of Operations Check out your rares, briefly noting bombs and what color combination(s) would let you play your best cards
I think the current relevance of mentioned interactions makes Dress Down very important so it deserves to be in the top 5, with the possibilty of even climbing up or falling down the ladder once the meta changes
Each defender represents multiple extra future birds if youre going to cast Wingmantle Chaplain multiple times
Bloodforged Battle-Axe duplicates itself whenever the equipped creature deals combat damage
It has the Izzet mechanic Jump-start, which allows you to cast the spell out of your graveyard after you cast it from your hand (or put it into your graveyard from your library thanks to something like Surveil)