As I mentioned here, I have a fully updated Cinnamon-disco. I am awaiting the new Cinnamon for Tina to add it to that mix. It would be more and more hard to add the newest Cinnamon to the Ubuntu base, without becoming fully Linux Mint on the way.
I can, of course, add the ppa to get the development Tina-Cinnamon right now, but would wait until the Tina repo is officially released. Then, my install would be Cinnamon-Tina-Disco. When, Ubuntu moves to the next E… repo, it’d be moved there to keep it on top of the development cycle. Anyone can do that. I can vouch that the Cinnamon-Tessa-Disco is doing excellently and is practically the best Ubuntu based modern distro.