Yes, November is realistic. It's mostly complete, we just need to make sure it's as perfect as possible before release.
If you have a larger cluster, we recommend creating a block level backup of the control panel server for disaster recovery. However, in November (ETA), we are releasing a feature called "control panel server replication" which will allow you to nominate another server in your panel to be the secondary control panel server. If your primary control panel fails, you can promote your secondary server to primary and that can take over the control panel role.