@Jonah Grimm thanks for your feedback. It's always very valuated.
We didn't add it because each category node (changed/added/moved/deleted) already have this info, but you're right, we're not displaying the totals.
Just out of curiosity ... are these metrics (total count/checked) something that you use and it's valuable in your daily basis? And ... the most important question, ... why? I mean, in which workflow do you use them?
That's being said ... yes! It's doable and it could be added in the "Items" header easily 🙂