- Has banding been eradicated? Unknown. Nikon certainly is aware of those reports, since it was discussed on major sites like dpreview within the reviews. Moreover, most of us believe the cause is a small math problem for the 14-bit ADC within the sensor, which should be able to be adjusted to give at least an improvement if not full eradication. This is going to be one of those things that's going to require finished cameras in testing to verify one way or another.
- Has focus speed been improved? Yes. What we don't know is how much, and the characteristics of the improvement. Moreover, there are a number of nuances that would need to discussed, and nuance requires testing.
- Will the Z6 and Z7 get any firmware updates of II generation features? I certainly hope so. There are a few bits of low-hanging fruit that would be useful to the first generation users. I don't think that "performance oriented" things can be done in the original cameras. So, something like 900 second shutter speeds, it should be possible, but things like the changes to focus performance probably can't be. Given that the original Z6 and Z7 appear to be staying in the lineup, Nikon should understand that firmware updates will keep those cameras selling. In other words, it's worth doing. But...we never know until it happens with things like this.
- Will we get pixel-shift in a firmware update on the II generation cameras? I certainly hope so.
- When will the cameras actually ship? Nikon went from specific dates to generic dates (November for the Z6 II, December for the Z7 II). Until product is actually tracked into the subsidiary inventories, I don't think we'll get a better date.
- What's the speed of the CFe slot on the camera? Is it faster than the slot on the previous models? The XQD cameras all max out to about 230MBps write speed. Any improvement here would be useful, particularly when the buffer fills.
- Will we get an FTZ Adapter that supports screw drive autofocus lenses. Unknown. This is what I call a "friction" problem. Many who raise this issue use it as their excuse for not buying a Z System camera. If Nikon actually made such an adapter, those folk would no longer have a reason not to buy the Z (but they might find a new complaint ;~).