One of the things I loved about the M9 was that IMO Leica nailed auto ISO in Manual mode. You could set your shutter speed, the aperture and allow the camera to pick the ISO. You could bias the ISO using EC. Perfect. Exactly what I would expect and what I would want.
This is not the way it works with the new M. As far as I can tell if you set the camera to M and ISO to auto, it seems to just pick 200. WTF?
Between this and goofiness of requiring you to awkwardly press the little button on the front to set EC, my nerd rage wants to have the beta testers for this camera flogged. These are two important things that the M9 nailed that the new M botches.