I'm not the product manager -- nor do I play one on TV -- but PVR's are always "considered", per se. If the scenario is compelling enough, anything is possible.
Nevertheless, I have not seen this particular scenario supported because it is not a frequent request and when it is, there is not enough of a financial justification. Do note that a workaround for this is to use Protection Manager with preferred interfaces and QSM.
Hope that helps!
--
Michael L. Barrow
Field Technical Lead - TESO
Data Protection
NetApp
+1.408.782.4249
barrow@netapp.com
www.netapp.com