What do you think of the Redux Ducks proposal?

To improve modularity Erik Rasmussen came up with Ducks: Redux Reducer Bundles. You can read the proposal here. A quick view at the rules:

A module...

1. MUST export default a function called reducer()
2. MUST export its action creators as functions
3. MUST have action types in the form npm-module-or-app/reducer/ACTION_TYPE
4. MAY export its action types as UPPER_SNAKE_CASE, if an external reducer needs to listen for them, or if it is a published reusable library

These same guidelines are recommended for {actionType, action, reducer} bundles that are shared as reusable Redux libraries.

What do you think of Redux Ducks? Would you use them yourself?