With regard to the leaders, I wonder if it would make sense to have a gap that is similar to the extension gap, but used to offset the arrow tip from the object? Being able to have a controllable gap there would serve the same purpose as the extension gap: to visually separate the annotation from the object it refers to. As I've been working with the leaders, I've often wished that I could have a little gap between the object and the leader's arrow tip.

--Larry