I had some big issues last week with upgrading our CCE. We still had 1.4.2 running, I started the manual upgrade and the installer installed 2.0.1. The setup was interrupting while setting up networks and certificates. Thanks to Shawn Harry I got the 2.0.0 msi installer.
After uninstalling 2.0.1 and installing 2.0.0 the upgrade went great.
The final upgrade to 2.0.1 was also great and without any failures.