I'm facing the same problem, i'm currently trying to integrate OPNSense at my new company but i'm probably going roll back to something more integrable with Ansible like CentOS + FirewallD or Shorewall because the API is not complete and/or there is no CLI to create rules and nat.
My second problem is that the hotplug of Virtio NIC seems not working under OPNSense, because of FreeBSD i suppose.
My second problem is that the hotplug of Virtio NIC seems not working under OPNSense, because of FreeBSD i suppose.