I have the same issue. So far I try to slightly under expose the image during shooting and have reduced the sharpness to 0. In post I boost the exposre and use a shadow sharpener plugin from Pixelstudios for FCXP. It brings back some life and sharpeness while helping to minimizes the aliasing. Definitley not perfect, but it is the best I have been able to do.
Disclaimer - I only have 18 flights on the Inspire and am still playing with the camera settings. I am anxious to hear more experienced pilots/editors ideas.