I got this idea while playing End Game. While it probably wouldn't fit into End Game's fast paced gameplay, it'd definitely fit into the campaign. The idea is that you can find news articles, documents, top secret files, etc. They then create a new journal entry, much like the ingame Intel objects. These new entries basically reveal new plot elements, like what is happening with Altis's gov't, what the "device" is and how it works, etc.
Just my idea that I believe could add onto the story elements of the campaign.