New Component to change some form values from an external component not in <Form>

Feature Request:

Hello,

Currently we can use Redux with a FormSpy to synchronize the formValues in a Store like ReduxForm.
In other word : initialValues will be set to store values and a formSpy will set the values in the store on each value changed.

The problem of this is that on each value changed the form is reseted, I am not sure it's good for performance.

I was wondering if we can do the following:
- Use a FormSpy to propagate FormField change to Redux
- Don't set store values as initialValues
- Create a component that is connected to the store and put this component (inside )
- As this component is inside the Form I can have access to "change" function.
- If someone outside the store want to change a value of the form, use an ACTION to change the store Values
- On value change, the "custom component" received (connected to the store) is called, and because it's inside can call "Change function" to change the form data.