The way you’ve tied everything together (functionality with example usage) is helpful. Nice! (You may have noticed that @anon44746896 cross-referenced your feature request with similar requests. There is now a list of Related issues in the MantisBT database.)
Fortunately, some of what you want exists within some addons.
The Historical Context addon gramplet by @kmikkels can overlay some contextual world or regional events onto the personal timeline of events for a Person. (The Potato famine being a good example.) How that gramplet evolved is an interesting read in another thread.
And there are a few ideas about waypoints that could tie travel itineraries together more tightly. But there are also some Geography Views that plot travel (moves) over time (some animated) and validate intersections of travel of ancestors. Plus there’s the ability to plot a person’s travel and overlay boundaries with Keyhole Markup Language (kml)
You can record custom-type “Disproven” Events (such as that purported date and place “Killed In Action”) with citations that show where the misinformation originated and why its wrong. This is helpful in preventing cycles of adding the misinformation, doing lots of research disproving it, and cleaning out all traces of the bad data.
You can also record those civil and ceremonial marriages with no conflict.