It was not until the release of Murders at Karlov Manor and Outlaws of Thunder Junction that we saw the actual adjusted card sets that were optimized for the rotation update
There's a lot of really notable cards that didn't make the cut, however, such as the likes of Teleportation Circle and Conjurer's Closet for repeated flickers or Cosmic Intervention for a more sweeping solution
According to EDHREC, we see Ranger-Captain of Eos in 123,367 lists, which equates to around 4.5% of all decks playing white
During gameplay, a player may choose to attack any other player, regardless of their position on the table, and can also choose to attack multiple different players during their attack phase
Playing three colors, even if it's just a splash, is likely very dangerous and probably should be avoided if possible
While respecting confidentiality, I can say that the art directors really value each artists unique style and encourage different creative approaches within the brief