It looks like your photo has pin dots from your speedlite, so I think in order to avoid that, since you were outdoors, you probably could have used a reflector to fill in the shadows and the light bouncing off the reflector would have made better catchlights in her eyes.

If you don't want to pay a lot for a reflector, you could buy a large piece of foam core board.
Here hair on her left side also looks a little blown, so maybe in the event of harsh sun, look for a place near that is in open shade.