The Commanded.Commands.Dispatcher.Payload struct includes fields such as the Commanded application, configured middleware, and dispatch timeout which aren't present (or cannot be modified) in the Commanded.Middleware.Pipeline struct. However, middleware can only access and modify fields contained within the Commanded.Middleware.Pipeline.

Due to the duplication of fields and to ensure that middleware can have full control over command dispatch the Commanded.Commands.Dispatcher.Payload struct should be removed. Extending the Commanded.Middleware.Pipeline module with helper functions to build the struct would be useful for consumers (and internally).