It would be helpful for you to state why the proposed thread won’t work instead of restating the problem the proposed thread is trying to address as if somehow that’s the solution.
Why would a single thread of development updates with no discussions be problematic?
The only thing I could think of is the worry that people would start ignoring the purpose of the thread.
But would they? Maybe, maybe not. Blender 2.8 viewport updates is a good example of one that seems to be working out and that one isn’t precluding discussions.
On the other hand, Blender developers meeting notes - 2018-06-25 illustrates the absurdity of forcing new threads to be created for single posts when they could effectively be posted in a single thread.