And usually, the main character is extremely distinctive, so they can slap the guy's face on the box art and sell a bunch of copies because a person looks at it and goes "that guy's cool, I'll buy it". Or they get heavily featured in the marketing. Think about Mankind Divided or WoW: Legion, both of which came out same time as Rev60. Adam Jensen is immediately visually distinct-he's got a great, muscular figure, he has some really cool mechanical augmentations, and he's got some nice shades too. That's just what you see first. Or with Legion, the two characters that featured heavily in the marketing were Varian Wyrmm (who carries a big fucking sword and has some really cool plate armor) and Sylvanas Windrunner (who's an undead archer and is immediatly distinct because she looks like she's been dead for centuries).
Who features predominantly in the promo material for Rev60? Ironically, not the main hero, but Minuete the traitor. And what have we commented about the characters of Rev60? That they look like Bratz dolls, and she's wearing a checkerboard dress. It looks visually bland, mostly because Minuete doesn't look like a 'hero' or even a major character. Many of the characters in fiction try to give off a sense of being larger then life, as that's part of the fantasy that sells a product. SJWs can bitch about that all they like, but even in the days of mythology, our heroes have been greater then us mere mortals.
That's what Brianna Wu doesn't get-every part of a character, from visual design to personality to how they drink their tea (see: Hercule Poirot) tells you something about them. The visual design of the main characters of Rev60 tell us very little, other then Holiday likes walking around with a ballsack on her head.