Generally... network-scripts will eventually go away - things will be moved to a framework involving NetworkManager. Hence, I don't believe pulling in an entirely different framework in the interim is really worth it.
It is worth. The problem is that other distributions borrow(ed) from FC(RH) and most often borrowed thing is initscripts. Sometimes it's the only thing they do to allow configure networking. If there is no straight way to switch from net-scripts, people will continue to use it. I want modern Linux systems to make use of modern network features independently of distribution they were installed from.