Some notes after trying it out from an actual Yarn global install:

• Missing dep launch-editor (fixed in 3bcc511)
• Error: Failed to resolve plugin: @vue/cli-service when creating a new project. For some reason, node_modules is empty with yarn.lock present.
• Some UI default values are not in-sync with the CLI (e.g. when choosing TypeScript, "Use class component" should default to true but it's not in UI, same for "Lint on Save")
• UI should show disconnected state if user terminates the process from the command line