I wish I could say 'when using this favorite, leave the leader-text-etc. with their current dimensions and positions, and only change pens-fonts-frame-layer' ('layer' can be excluded already).
I have a label favorite with the right pens and font and frame for a 'keynote-plan'. I have a drawing in which I was just copypasting/injecting and I the frames are missing. When I select all labels and click the favorite, the position of the label relative to the leader flips in some of them so that I now need to go manually and move them around so that they don't overlay room numbers or whatever.