Can't get to the location for a rear bar, and there'* good framing there anyway.
I'd LIKE to come up with a bracket for each end of each new bar, so installation is simpler and cleaner, and the box required for shipping would be much smaller. Especially if the pieces are made to be universal L/R by simply flipping the brackets around.
Benefits would be a much more rigid ride. Same step in performance perhaps that the 87-91 crowd get when they install our STB for the first time. This would triangulate the load. I know that my bar flexes in hard corners. It rubs on my hood insulator sometimes.