I don't think it became less gritty in comparison to the first teaser, but it has way more bling and gangbanger stuff now, plus daylight sunny scenes. And they seems to skew the mood a bit. Though night stuff didn't go anywhere. Now, Blade Runner 2049 felt a lot more restrained and monochromatic in comparison, but the first teaser didn't look like that. Original Blade Runner is REALLY colorful, full of all kinds of neon lights, so I don't get this argument.
I also believe that promos give an impression the game is more wacky, like GTA or Saints Row, than it actually is. If you look closer, despite all the color and bling, it's pretty serious.