Regarding contour lines and elevation data: I suggest that adding a limited set of contour lines to the map would be simple but effective communication.

How about showing where 10-meter contours (or 5- or 20-meters ??) intersect the rover's route? And extend the lines just a short distance to either side of the route. That would make the most vital information available at a glance - how steep is the terrain? What is the cumulative change? - without too much visual clutter.

Adding data to every sol's text on the sidebar might be useful, or it might contribute to a case of too much data.