That's what I usually do too. Just for the construction lines, I thought it would be more convenient to use an xref.
With a drawing, I would have it under the whole floor plan, which can get into way, especially when you have the "magnet" selection on. Also, for the export of dwgs, I think it works better with an xref.
And when it comes to xref's tralslators, what do they control then? I have to admit, I don't have much experience with translators at the import.