As of now we have the ability to create overrides for the ASG Additional Configuration manifest type, but not for ASG Configuration, Launch Template, Scaling Policy, or Scheduled Actions. We would like to be able to override all of these manifest types.

Some manifest types, such as ASG Scaling Policy, accept multiple manifest files in the service configuration. For these manifest types, either the behavior of the override appending to the existing manifest set defined on the service or the overrides replacing the entire manifest set would be acceptable. A stretch goal would be to allow selecting from one of three actions when configuring an override for a manifest type that accepts multiple values: (1) append to existing, (2) replace specific existing manifest, or (3) replace the entire set, which could also be used to override to empty set.

Additionally, the User Data file is not treated as a manifest at all. We would also like to be able to override this file.