Like I said, you're essentially getting your boxers in a twist over a symlink to an ISO. It's petty and stupid. I'm sure there will be a Cinnamon spin at some point. Spins aren't all that difficult to do with the infrastructure Fedora has in place for it and someone will take the initiative to do it. That said, it will never be the "default". There really is no point whatsoever in making it so.
No announcement yet.
Fedora Proposal To Use Cinnamon Desktop By Default