IMO DM's description of the person she saw is widely vague BUT at the same time a decent piece of circumstantial evidence at the very least. She didn't say it was a 5'2" female, or a 6'8" elderly Asian man, or a set of conjoined triplets attached at the hips. She saw a single man with the very basics of Kohberger's build.
I'm also a little bit curious about the mask she witnessed the suspect wearing. It's quoted in
the PCA as "a mask that covered the person's mouth and nose". That certainly doesn't exclude very many types of masks, but that may not be the only description of the mask she provided to LE. For all we know, which is nothing, she could have told LE that the mask is a fabric Covid mask that is blue with black polka dots and has yellow bands that attach the mask over the wearer's ears and she recognized the mask immediately because she's seen it for sale at Target. That's a complete hypothetical but what I'm getting at is there's a possibility, especially if the mask was a Covid-type, that a description of the mask has at least a
possibility to further tie Kohberger to the crime. Covid masks were required in many public places over the last few years. Kohberger's classmates would likely be able to describe at least a "type" of mask he may have frequently worn, and perhaps he even always wore the same one (disposable or washable). Again, if DM described that same mask that Kohberger's classmates could describe, that's more circumstantial evidence with ascending or descending importance based on "uniqueness" of the description.
Just MO but it seems likely that the mask would be a Covid-type because that's the least likely of all masks to draw attention anywhere, even while driving in the car. But of course it could be a Donald Trump or a Baby Yoda Halloween mask for all we know. But again, a distinct Halloween mask would offer yet another chance to tie Kohberger via description if he ever wore it anywhere previously on Halloween...