Moana has a lot of Princess synergy in this deck, including three copies of Minnie Mouse, Beloved Princess, and two copies of Ariel, On Human Legs, but the only card you really need to get value from Moana is Cinderella, Gentle and Kind
Unless the card says otherwise, you don't have to wait until your turn to activate an activated ability
One common through-line that I feel seemed to be the case throughout the set was the value of Torbran, Thane of Red Fell - this Dwarf is just very good at making some of the best cards in this set seem better: I expect to see token strategies, fast aggressive strategies, and burn-based strategies all get a bump from the cards in this set
Hiro Hamada, Robotics Prodigy is also a great card to have in your opening hand, as its tutoring ability will let you quickly set up future turns
Scion of Vitu-Ghazi Scion of Vitu-Ghazi is a 4/4 that makes two 1/1 bird tokens with flying at its floor, which is already a good midrange card