I thinks the statistics page could do a lot better than it currently is now. Another thing is about the stats on movies watched. I think the progress bar shows movies on your watch list not movies you've already watched.
SeriesGuide does not track what movies you have watched, so it can not show a statistic. Maybe vote for https://seriesguide.uservoice.com/forums/189742-ideas-and-suggestions/suggestions/5578902-a-watched-list-for-movies
If you have other specific suggestions, please submit them. A general “could do a lot better” does not help me much.