I don't know anything about embargo, but I consider that will not be anything shocking in the new A329S.
On A329 I accept that it was something fantastic, the SSD support but don't expect to see something fantastic like that on A329S.
As hardware, the main features of A329S are already presented, like: 3 channels, coaxial cables on all cameras, new RTC-400 style secondary cameras which is almost the same as RTC-300 but with the cooling improved, a great new wide lens for interior, many sales options like S, T, SW versions.
I would like to see detachable mounts for the secondary cameras like are on WM1 or VS1. I asked about this before the release of the A229 Pro secondary cameras.
Regarding firmware for sure there will be new functions, some of them as ideas created by Viofo with the help, or not, from people outside Viofo. Viofo can no do anything they want, there must be some collaboration and limits with Novatek, but I have the feeling that it is a good collaboration between they and Novatek.
So I consider the unknown expectations to be from the firmware, new functions and accessories and not only from the camera itself. But again, nothing shocking like it was for me the SSD support which was a big surprise from Viofo.