Cannot add multiple members of a failover cluster to a DFSR replication group

Server 2012 RTM. I have two physical servers, in two separate data centers 35 miles apart, with a GbE link over metro fibre between them. Both have a large (10TB+) local RAID storage arrays, but given the physical separation there is no physical shared storage.
The hosts need to be in a Windows failover cluster (WSFC), so that I can run high-availability VMs and SQL Availability Groups across these two hosts for HA and DR. VM and SQL app data storage is using a SOFS (scale out file server) network share on separate
servers.
I need to be able to use DFSR to replicate multi-TB user data file folders between the two local storage arrays on these two hosts for HA and DR. But when I try to add the second server to a DFSR replication group, I get the error:
The specified member is part of a failover cluster that is already a member of the replication group. You cannot add multiple members for the same cluster to a replication group.
I'm not clear why this has to be a restriction. I need to be able to replicate files somehow for HA & DR of the 10TB+ of file storage. I can't use a clustered file server for file storage, as I don't have any shared storage on these two servers. Likewise
I can't run a HA single DFSR target for the same reason (no shared storage) - and in any case, this doesn't solve the problem of replicating files between the two hosts for HA & DR. DFSR is the solution for replicating files storage across servers with
non-shared storage.
Why would there be a restriction against using DFSR between multiple hosts in a cluster, so long as you are not trying to replicate folders in a shared storage target accessible to both hosts (which would obviously be a problem)? So long as you are not replicating
folders in c:\ClusterStorage, there should be no conflict. 
Is there a workaround or alternative solution?

Yes, I read that series. But it doesn't address the issue. The article is about making a DFSR target highly available. That won't help me here.
I need to be able to use DFSR to replicate files between two different servers, with those servers being in a WSFC for the purpose of providing other clustered services (Hyper-V, SQL availability groups, etc.). DFSR should not interfere with this, but it
is being blocked between nodes in the same WSFC for a reason that is not clear to me.
This is a valid use case and I can't see an alternative solution in the case where you only have two physical servers. Windows needs to be able to provide HA, DR, and replication of everything - VMs, SQL, and file folders. But it seems that this artificial
barrier is causing us to need to choose either clustered services or DFSR between nodes. But I can't see any rationale to block DFSR between cluster nodes - especially those without shared storage.
Perhaps this blanket block should be changed to a more selective block at the DFSR folder level, not the node level.

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