Ops Center's Command Line Interface saw a few improvements in 12.2. If you haven't used it, by the way, Ops Center's CLI is a handy tool if you prefer CLI interactions over the UI or if you want to create your own scripts for automation.
The biggest improvement was in the area of certificates. When you connect to your Enterprise Controller from a remote system, you must accept the server's certificates. Once accepted, these certificates are stored in a local trust store and don't need to be accepted each time. You can also use the -a | --accept-all-certificates option to automatically accept these certificates, and use the new certificates mode to view and manage the list of trusted certificates for remote ECs.
There's also a new option, -C <channel>, that you can use in the Update Mode to specify a channel name when you're creating an OS update profile or working with OS update content.
For more information about the CLI, you should take a look at the Command Line Interface Guide.