And the panning speed in a zoomed in image is way too slow, on a nikon camera I can quickly confirm my focus after taking a shot by zooming in and panning around the image with the d-pad, in sigma when you hold down the d-pad to pan over you image the repeat rate is way slow. it takes like 3-4 seconds to move from one side of the image to the other.
When using the touch screen it is smooth. so its not like the camera cannot make a smooth fast pan over a zoomed in image.
Those things are simple to fix in firmware but i have never seen firmware that fixes these kind of things.
In the end it all adds up, and it slow you down