Brand changes no longer need the dashboard. samva brands default acme makes a brand the one templates and domains use when they name none. samva brands remove acme deletes one you no longer need, and the default brand can't be deleted, so move the default first.
Both take --dry-run to preview and --json for scripts. Removing asks for confirmation in a terminal and needs --yes anywhere else.
What you need to do. Update the CLI to 0.22 or later.
Template commands such as samva templates check now also honor --org and --profile when they look up your brand.