It's a nice idea and looks like it's implemented well. My problem is probably that different things are significant to different people. Following that thread leads to filter bubbles, of course.
For big international (usually bad!) news I tend to go to Wikipedia Current Events: https://en.wikipedia.org/wiki/Portal:Current_events
Could News Minimalist have an option to only show good news with some significance? I think that might be popular and quite useful for the mental health of lots of people.
Good things do happen but they're under-reported because death, destruction and conflict draw more clicks & views. A way to surface the less depressing news would be welcome.