I agree that Mozilla has been doing that from the developer side of things; however, I would wager that most users not in Bugzilla/on the dev mailing lists are unaware of the coming changes and how they might be affected.
I'm a programmer and use FF daily. However, I'm not super involved on the FF dev side of things, and so have never even seen those discussions you linked. What I'm hoping is a) I'm not the only one in this boat, and b) that this discussion can be raised to the level of say Mozilla/Firefox newsletters, Twitter, and blogs. Everything I've seen coming from those channels so far has been communications re. "This is what we're doing - yay us!", never, "Hey, we're thinking about doing this. How would it affect you?"
If I'm somehow totally out of the loop and have missed something I apologize. However, when I see something like this [1], then I start paying attention. I suspect I am not alone.