1. As of now, there are no official announcements or documentation that suggests an update towards supporting additional AgentConfigName types in the create_default_formatter method of the TemplateFormatter. However, as per the demand or customization requirements of users or for broader applicability, there might be potential updates to this.

2. Any newly introduced instruction configurations would typically need to have their template definitions added to this class, so as to ensure that the new instructions are properly formatted. This could potentially affect existing functionality as it would need to be updated or adapted to accommodate the new instructions. However, without specific details about what these new instruction configurations might be, it’s hard to ascertain the exact impact. The developers would have to ensure that any new additions maintain compatibility with the existing architecture and functionality.