I think waterman did a good job with the scratched canopy but I also agree that the reflections shouldn't be left out and perhaps a little more variation with those scratches.
Perhaps multiple versions would do the job. One with reflections, scratches or one without reflections.
Now if the helmet visor would be completely black and reflective...
And in my opinion the Mirage has one of the best external models in DCS World. In comparison with the Viggen the Mirage has a much more detailed cockpit, texture wise as well.