I use the exact four facets or “Cs” as I call them to collapse digital media, too. I definitely think there are a few more pillars. With yours above, I also discuss Collaboration, Campaigns, and Context/Connection. Collaboration is average partnering third party internet sites, apps, etc where shared content material and conversation between various but related audiences might have an effect. Campaigns take collaborations a step extra and is a wrapper for many of the other C features.
Context/Connection is what the viewers’s impression can be or how it’s relates to them. You could separate the terms but I think they’re close enough in connotation to simply seek advice from them in combination for clarification purposes.