Their excellent shuffle feel enhances gameplay, making each game smooth and enjoyable
That would be because of mana burn
I personally pick Dina, Soul Steeper as an excellent off-ramp and can win with Exquisite Blood and a land like Festering Gulch, but I'm sure you can get more creative with near-infinite draw and a near-infinite graveyard
Though the first will grab you a card or two on occasion, it mostly serves to disincentivize small swings that might have been sent your way on a whim
The new decks for Archazia's Island definitely feel like they're based on using glimmer team-ups (a trend that's been in Lorcana for a while), which might make customizing the deck a challenge
Add in Cheshire Cat, Not All There's and Kuzco, Temperamental Emperor's mutually assured destruction, Flynn Rider, Charming Rogue forcing you to discard (just one card), and Mother Gothel, Selfish Manipulator's ability to stop opponents questing, and Emerald decks will quickly become the most annoying to play against