Echoing others, the likely reason they aren’t more forthcoming is competitive advantage. If they revealed they were doing X-Y-Z, it give their competitors a leg up. They also risk over-promising and under-delivering.
I don’t expect much communication from them until just before a new feature launches.
In the meantime, the community does a good job at reporting on what Zwift is right now. Have you seen all the links in the resource thread?