For exemple, the perk that give you 1 ancient tablet per 2 event completed would indicate "(Current : 5 event completed)" or "(Get 2 tablets instantly)".
That way you have better information when taking the cornerstone, especially if you have quests related to that.
Activity Newest / Oldest
Status changed to: Done
I think this suggestion is now in the game already
Status changed to: In progress
on a related note, some other cornerstones could also use a bit more info to judge how much you're actually getting out of some of these. Like say, how many farmers are currently benefiting from the cornerstone that gives them extra double production chance when fed biscuits.
And for forest mysteries that track conditional gains while active, a total count for previous years, not just how much you've gained while its active.
Also on any other feature that activates retroactively. When hovering over it or similiar a tooltip could appear