This focus can be seen on cards like Emet-Selch, Unsundered
2 Ariel - Sonic Warrior 220/204, Steel There's no way to give Ursula the stage without giving Ariel a spotlight to match, and Disney Lorcana: Ursula's Return definitely does that with Ariel - Sonic Warrior
Additional creature cards discarded beyond the first won't result in additional Moogle tokens, and additional noncreature cards discarded beyond the first won't result in additional counters
Bowmasters is infamous, too, for being such a forgettable character within the IP
Izzet is widely considered the strongest or one of the strongest archetypes, which means you will have lower-quality Izzet decks when you're contested for the cards
Each deck can have one or two Ink colors, so I imagine Amethyst will be a popular choice to pair with one of the others, if only for the card draw options