<p><pre><code>  &gt; This doesn&#x27;t sound right to me. There is no need 
  &gt; to do address translation in IPv6 networks. It may 
  &gt; be that there is still a firewall in place with rules
  &gt; about incoming and outgoing connections, though.
</code></pre>
Multi-wan egress balancing (without bgp) is one usecase for NAT66 (NPTv6).