I would really like to see multi-point (and spline-based) leader lines.
More flexible leader lines would really make my life easier when adding notes. I spend too much time moving notes around in order to make the current leader lines work. Currently, there are times where I can't move the notes at all and then I have to create a spline and insert an arrow at the end... very laborious and un-Revit-like.
See attachment.