It's funny how the dialogue box when you import a D-ref'd networks asks for "label style" on structures. I can't think of a single case where all structures in a real network should have the same type of label. And breakpoints/null structures shouldn't even have labels...
If someone needs an example consider a firepost and a drainage manhole. They should not have the same type of label.
Give us the option to either reference the source pipe netowork labels or an ability to cope+paste the labels manually assigned to each structure/pipe in one drawing to another drawing.