Need 2 versions of draft-comment

We work in a structured environment in Frame2019. Our writers currently use the draft-comment element to add source references about the content (which may not be the best element for this type of comment?). We want to retain this content for reference from year to year but we do not want it to appear in the final published pdf & epub.

Increasingly, we are also using the draft-comment element as a form of communication between the writers, subject matter experts and editor (as an action type comment, e.g., "I added this paragraph, can you validate?") The communication back and forth needs to be visible in Frame, Oxy Web Author and a pdf. This communication back and forth is removed when the issue is resolved and is not maintained in the dita when the content has been finalized. 

What we have found is that the comments addressed to the writer, editor or subject matter experts are getting missed because we have so many sources referenced.

We publish a pdf for Subject Matter Expert review and in that pdf, we want the source (reference) draft-comments and well as any action-item communication.

What is the best way to distinguish these 2 types of "comments" that will be easy for our writers to "tag" so they can visually be identified but can't accidently be missed or inadvertently hidden? Is there another element that we should be using? A benefit of using a new element for the "communication" type comments would be that we could do a search at the final hour to make sure everything was resolved and those comments removed.

Thanks,

Leigh