Regarding 96khz downsampling to 48khz.
I have had this reply from WD
"Thank you for contacting Western Digital Customer Service and Support.
After having your case being reviewed by our seniors.
Please be informed that, the issue you are experiencing is not a hardware restriction, just a firmware bug.
Our firmware development department is currently working on new firmware releases and hopefully this will be covered on one of the new firmware updates.
But unfortunately, we are unable to confirm nor guarantee when or if it will be fixed, as we do not have this information available.
If you have any further questions, please reply to this email and we will be happy to assist you further. "
So keep your fingers crossed