I could be wrong, but I don't think anyone is trying to stop you. There is, however, a procedure to be followed to get things in. Currently, the way to get your packages "into" Fedora is through Extras which has a well-defined package submittal and maintenance process documented at:
Thank you for the hint, I will follow the procedure.
So, is there some way that you could package your networking scripts as an "add on" that would work alongside the existing scripts? If so, it would be relatively easy to get them into Fedora Extras where they could be tested (including comparisons with the existing scripts!), used by folks so that people become familiar with them, and perhaps eventually added to Core.
/etc/net can't do it's job without integration into system init, but I hope we will return to it when I am finifhed with Extras.