In the long run, what matters is that you and your tablemates have fun
Shaddoll Monsters are all flip monsters that also have effects when sent from the deck to the graveyard, but the big draw here is the fusion spell, Shadoll Fusion
These different ways of winning with combos, and the different decks that they are found in, contribute massively to how fulfilling it feels to pull them off and, indeed, how fulfilling they feel to play against
Having access to blue helps these decks generate card advantage and have non-removal-based interaction, which makes them generally better
It would appear that Draft Boosters and Set Boosters can have both foils and nonfoils of Showcase or Borderless treatments, but no Extended Art at all
White technically got its first relentless creature in Templar Knight, but Hare Apparent hit the scene shortly after and gives players a much more realistic card to build-around, with a much bigger reward