Quite frankly is a totally unexplored area of discussion.
And I'm quite glad you are exploring it. But I'm not sure that simply providing a more serviceable corridor between Fedora and RHEL will get you the same thing. With the Ubuntu upgrade path you have a continuous thread you can climb, in a release by release fashion, or in a skip one/take one/skip three/take one fashion. But each release is intended to be production ready. The support schedule is what varies. With Fedora/RHEL you have a somewhat larger gap. Fedora (as a technology showcase) can say "Hey, Look! We've just dumped cool new Feature X into the distro!" (crash). Meanwhile, RHEL/CentOS are chugging along with very serviceable and reliable, yet somewhat behind the the curve, offerings.
Some of us would like choices that a little more in between.