Because the first four sets will no longer be legal in competition play, the Fabled set will reprint some cards from those first four to allow them to be used in competitions
Not necessarily
Through these decks, players get a taste of the rich story and varied characters of the Disney Lorcana TCG
It's also very noticeable to me that, whereas the Lorwyn decks were both focused on fun but niche strategies, the Turtles deck is about tokens and +1/+1 counters - two of the most prevalent themes in Commander
It's because it allows players to use cards that they do not physically own
It reads: Whenever a character quests while here, you may draw a card, then choose and discard a card. That means Beast, Relentless can not only quest multiple times per turn if you can dish out the damage, hell also be drawing and discarding a card for you each time you do it