Well, this crop was supposed to show how well the detail is preserved at midrange ISO sensitivities, but I doubt you can see it. So see the original. Since her hair's in motion it suffers from a little softness and color contamination, but it's not bad.
This and the next slide are 100 percent crops from sequential photos (sort of -- there's one shot between them, but it looks similar enough that I stand by my point). It shows how the focus system has trouble with the helmet blocking his face.
You can see that the autofocus and metering systems jumped from his helmet to his face (this, of course, is the focus I wanted). This is a particularly difficult situation for every camera, and my point is not that the A9 fails, but that there are no miracles here.
Here's the original. It's not a great shot, but it gives you a sense of how much highlight tonal range is captured. Note that I was shooting in sRGB and I can't yet view the raws, so it probably gets better.
We really need tracking metering systems to keep up with tracking autofocus; these are two sequential shots -- the underexposed shot came first -- and they've barely moved, but the metering system took about two shots to adjust. You could probably fix the exposure, but not outdoors if the subject is moving through sunlight and shade.