The release for 2.8 is already done
- at least as far as the Windows version and the source code goes.
However, I am pretty sure she's going through the painstaking trouble of collecting all the git changes to actually make for the news post. (I've worked with projects like that before, while I never did anything on the magnitude of ZDoom, even what I've done requires a bit of work when you've got hundreds to thousands of commits to sort through - it can take hours, sometimes even days, to make a proper news post)
She may or may not be waiting until she has a Mac OS release ready, to make that post, too.
So the short answer, my guess would be, is - She's working on it, and it will be ready when it's ready™.