In fighting game terminology, "Cheap" refers to characters that are overpowered to the point of breaking the game's balance. Goku MUI is almost inherently designed to be a "Cheap" character, meant to be a boss or a last resort for players facing other overpowered opponents.
Creating a paper action figure of Mastered Ultra Instinct (MUI) based on his goku mui mugen
Where does rank? The answer is paradoxical: It ranks wherever the code says it ranks. In fighting game terminology, "Cheap" refers to characters