The decks are genuinely a ton of fun to play, but thats not the only reason theyre so great to play with
The bat cleric preserves all its counters when it dies, which is a nice touch for something youve invested a lot of time into
You had to name your new deck 'thewayisopen' (don't worry that it's 'invalid' for play)
The best Lili card in the game, and maybe one of the best planeswalker cards ever, has officially entered Standard and, more notably, Pioneer

3 Chaos, the Endless Cid, Timeless Artificer Cloud of Darkness Diamond Weapon Exdeath, Void Warlock Fang, Fearless l'Cie Freya Crescent G'raha Tia Gaius van Baelsar Garland, Knight of Cornelia Garnet, Princess of Alexandria Giott, King of the Dwarves Gladiolus Amicitia Ignis Scientia Judge Magister Gabranth Locke Cole Neo Exdeath, Dimension's End Omega, Heartless Evolution Prompto Argentum Queen Brahne Quina, Qu Gourmet Quistis Trepe Ragnarok, Divine Deliverance Reno and Rude Ring of the Lucii Rinoa Heartilly Rufus Shinra Rydia, Summoner of Mist Shantotto, Tactician Magician Snow Villiers The Emperor of Palamecia The Lord Master of Hell The Prima Vista Tidus, Blitzball Star Torgal, A Fine Hound Ultimecia, Omnipotent Ultimecia, Time Sorceress Ultros, Obnoxious Octopus Vanille, Cheerful l'Cie World Champion, Celestial Weapon Yiazmat, Ultimate Mark Zack Fair Zidane, Tantalus Thief

The new Theros: Beyond Death mechanics have been revealed and players now have a solid idea about how the limited and constructed formats will play out