It would be awesome if we could duplicate a group of objects (or a frame), where if you altered one, then all the clones or duplicates of that itemed updated also.
For example if I am wireframing a website and I want to have a section of the web page that is the same on every page view, I could create a “smart object” that I could duplicate a number of times in the board. Then if I want to make an edit to all of the smart objects, at the same time, I edit one and they all update to the new version.
A bit like the building blocks feature, but editable in the board.

