Yeah, this would be nice. The X axis would be time, the Y axis would be the value (not percentage as it is now). You'd be able to see the whole timeline and how the value changes.

This was actually our initial plan. But we needed to take down the scope a bit to be able to release a version 1.0 Maybe later it can be implemented but there are still quite a few things that needs to be done before that can be looked into.