+1 Something like Alpha without fast support and for known companies that build on top of Enhance like cPFence. Because it's good when they are also ready when the new version is ready and it's not production at all.
Beta for companies that have a test envirorment or devs that love to get the new features and take the risk. But still no fast support.
And maybe a release candidate for a limited amount of smaller production clusters where the support fix manually issues fast if needed. This would be the version that looks like already stable, but needs some test in production. Because there will always something unexpected happen, just Murphys Law.
This would distress the support, help you to make the testing faster and more efficient. And for us the stable version will be stable and safe for production.