well it looks like I'll need to shutdown before replication and i guess probably storage snaps too. Core services came up as unrecoverable. In case it's related, appliance copy booted wanting to use eth1 network interface but vdp seemed to reference /etc/sysconfig/network/ifcfg-eth0. I renamed this to ifcfg-eth1 and was able to access web interface but thats where I encountered core services unrecoverable. Same thing here when appliance wasn't shutdown prior to replication: http://blogs.vmware.com/vsphere/2012/12/recover-replicated-vdp-appliance.html.
So I'm replicating again now with the appliance down and ignoring the network issue for the time being...