We just got the first RevE 7020 module. With the RevC everything works.
We install the QSPI and eMMC through booting a small LINUX from SDcard.
With RevE the Linux boot stops with a Kernel panic or a maintenance request, when write access to the SD card is needed. It finds errors in the filesystem which are cleaned up with RevC. With RevE it just complains that no Write is possible and stops.
I tried to write something to the SDcard in UBOOT and that seems to work. Of course the SDcard is writeable in other computers.