Someone from the team should make a PGKBUILD for this driver and the patch
But would be best if that team member has the device and can test it … On the other hand, it could be based on this http://aur.archlinux.org/packages/rtl8192eu but then you need base-devel, kernel headers and dkms by default in the ISO and also add the patch … not very convenient.
So, install the system and proceed to have it working.