Currently, retrieving information from an earlier version of a board requires restoring the entirety of a previous board--just to see what's there. I would love to be able to select a single element (say a sticky note), access the ellipses menu, and see a full history of the element's lifetime (inception, individual edits) at a glance--allowing me to quickly review and rescue previous versions of its content.

This would save a huge amount of time for situations where you don't know precisely when a change was made (most of the time).