Of course, that isnt enough to win the game, and Ketramose often leans on flicker effects to handle that
The biggest flaw in Magic is the number of games that are decided by a mana screw or a flood
Unless they're absolutely egregious (like Nadu, Winged Wisdom), cards should no longer go directly from legal to banned, and instead will go from legal to Game Changer
The key differences come down to opponent count, card pool, and a handful of rules tweaks: Opponent count: Brawl is a oneonone format
My final advice would be: use the basic frame structure as a constraint (limitation breeds creativity, Mark Rosewater says), and if needed work from there to create new details that are really meaningful for the game, and be more careful not to create more noise
For as long as it remains exiled, that player may play it using its primary characteristics