One of five planeswalkers in the set to be compleated, Vraska, Betrayals Sting is doing what Liliana usually does: being an immensely powerful black planeswalker
While Yuna doesn't give the card draw that makes these decks run so well, she offers enough other abilities to make her one to consider
Includes a mix of tokens, counter cards, and a storage box, providing everything needed for quick, engaging multiplayer gameplay
Personally, I quickly replaced them with dice to track damage and Lore
Creature theft effects and bounce effects make it so that running a card as suboptimal as Fowl Play shouldnt be necessary even if it has an occasional nice interaction, like turning an Elesh Norn or Griselbrand into a Chicken where stealing/bouncing it may have caused you to lose
The biggest weakness of running mill in Commander is that you need to mill through so many cards, and Bruvac lets you do that twice as fast