Double-faced cards will make a big appearance in MTG Final Fantasy too, though this is a returning mechanic as opposed to a new one
The gameplan of using Fetchlands, Shocklands, and Street Wraith to lower your own life total and make Deaths Shadow a deadly threat used to be very strong
Obviously there are some outlier, but most of the commander cards are not that
No Problem
Almost impossible to remove after play without a Be Prepared, then lends Ward to another character and gains 3 Lore

Facilier, Fortune Teller Super Rare 80 Enchantress, Unexpected Judge Common 81 Flynn Rider, Confident Vagabond Common 82 Flynn Rider, His Own Biggest Fan Rare 83 Gaston, Scheming Suitor Common 84 Little John, Loyal Friend Rare 85 Lucifer, Cunning Cat Rare 86 Pain, Underworld Imp Uncommon 87 Panic, Underworld Imp Common 88 Pete, Bad Guy Rare 89 Prince John, Greediest of All Rare 90 Queen of Hearts, Quick-Tempered Common 91 Ratigan, Criminal Mastermind Common 92 Ray, Easygoing Firefly Common 93 The Queen, Disguised Peddler Super Rare 94 Tiana, True Princess Uncommon 95 Virana, Fang Chief Common 96 Bibbidi Bobbidi Boo Rare 97 Bounce Uncommon 98 Hypnotize Common 99 Improvise Common 100 Pack Antics Rare 101 Ring the Bell Uncommon 102 Ratigans Marvelous Trap Rare 103 Baloo, Fun-Loving Bear Common 104 Boun, Precarious Entrepreneru Common 105 Card Soldiers, Full Deck Uncommon 106 Donald Duck, Not Again