Kevin, thanks for the preview of the E-M1 II. I'm looking forward to your full review. I'm particularly interested in the higher ISO noise performance, since more pixels have been added to the sensor. In that regard, could you also look at noise during long exposures? The E-M1, as good as it is, has been notoriously noisy at exposures longer than about 30 seconds. It can be alleviated by turning on LE noise reduction, but that requires it to perform a second black-frame exposure equal in length to the first. So a five minute exposure with noise reduction ties up the camera for ten minutes.
One other note concerning a point you made in the article about not being able to use auto ISO in manual mode. Unless the mark II has changed from the mark I (I hope not!), you can get auto ISO to work in manual mode by going into the menu under Cog E and changing ISO-Auto to All. The one drawback is that by default, you can't change exposure compensation under this configuration, since the front wheel switches to controlling aperture instead. I've seen reports that exposure comp (via ISO) can be reassigned to another button, but I haven't tried that.