Can they even determine "What's next?" very accurately though? I imagine the various teams are pushing out what they can, when they can, and don't even have a clear picture of timeline themselves. Callum isn't walking around the office with a notepad looking over people's shoulders and writing down what progress they've made (as far as I know they're still working from home anyway). It would take the devs a non-zero amount of time and effort to provide Callum with an outline of all the things they think might be coming soon.
Then what if they misjudge something and find a critical error that delays rollout? I can see the posts now haha: "They said perks were coming soon two patches ago and we still don't have them, how dare they!"
You're right, mexxico has been doing an awesome job discussing things he has first-hand knowledge of, but I've got to imagine it's really time consuming to read people's posts and write meaningful responses in return.
Any type of software development of this magnitude usually comes with a work plan of some kind, and especially working from home they have to have some kind of internal document to know who is working on what and when they can be expected to be done with that.
Now I am not asking that they share that with us, that would be insane, but a general roadmap would be much appreciated and it would make reporting relevant bugs easier. Devs wouldn't really need to give anything to Callum, the outline you are talking of is already there (unless they are just letting everyone work on random things with no supervision, in which case we are all doomed

but I somehow doubt that is the case).
And yes I don't think that devs coming to answer in individual threads is a very efficient use of their time, it's part of why I am asking for this (it's awesome that they do that, don't get me wrong, but it's not their job). It's also really not uncommon to do this for EA titles.