If you stitch your panos outside of the DJI app like I do (PTGUI Pro) and also do a lot of shooting into the sun, the ability to stitch AEB photos in a panorama results in better qualtiy, ie, more detail in the highlights and shadows.Not sure I understand the point of having AEB for panos. Just change your settings after each pano is finished.
I too would like that ability to shoot AEB panos.