My take on it is that this look is more of a contemporary view of a dystopian future, in the same way as the original's look was a product of that time. Aping the old look would in my opinion be disingenuous, you would have to take a retro futuristic approach "How would the future look in the 80s?". It would feel more like fan service than anything else. The movie has to stand on it's own, it's look and it's themes have to be relevant today. 30 years have past in both worlds, I think the movie should reflect that.
This is the also feeling I'm getting regarding the look. If imagining early 80s Los Angeles and the dystopian aesthetic applied to it against the film's 2019 setting means there should follow three decades worth of "clean up" I would assume. I lived in LA in the 80s-90s and the same area certainly feels less grimey than I remembered. Hey, or I could just very well be imagining those times through a filter myself. Point is everything now is so pristine compared to 30 years ago and the film reflecting that is just that.