I want web components to enable exposing elements to assistive technology and forms

Currently when using web components and shadowRoot, any element within the shadowRoot will not be noticed by, say a screen readers, or even a form (for example when doing a form input).
There is an effort to come up with a solution to the form part, but that would not automatically solve the assistive technology part.
It would be awesome to be able to add some ARIA/role attributes to the component tag or identify elements that should be exposed within the shadowRoot to make the the component accessible.