The magnetized lid keeps them secure
While its symmetrical effect is typically seen as a downside compared to Doubling Season, you should instead use its presence on the field to your political advantage: Dont remove me from the game, youre getting value off of my Primal Vigor, Wait, I can cast Primal Vigor next turn and we can swing in with all those Tempt with Vengeance tokens, etc
TL;DR I would slightly flatten out the top of the power curve
That means fewer taps to reach favorites, uncluttered menus, and intelligent onboarding prompts that teach essential gestures without getting in the way
This is where regular Pokmon League events, prereleases, League Challenges, and competitive tournaments take place