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The one thing Kirby always made sure to do when designing teams was having each character be visually distinctive. Sure, they can all have the same uniform, but there should be some unique flair to each one that denotes a little about their powerset and personality.
It is consistent in almost all his works: the F4 are all wearing the same uniform and yet each is visually unique when they activate their powers: Reed is all stretchy, Sue is invisible, Johnny is engulfed in flames and well Ben is just handsome.
X-Men, same thing, they all have the same uniform and yet Scott has a visor, Angel has wings, Beast has gorilla proportions, Jean has boobs and Bobby is made of ice.
New Gods, not a team, but a race, so every character wears unique clothes, but they all share similar motifs.
And what does Disney does with the Eternals? Just color swap the same boring costume and move around the tiny circles.