The old 2D view had a super useful feature that showed the height or mask value at a specific pixel, but with it merging with the 3D view that feature is no longer available.
I think this could easily be included again by making use of the little center sphere that appears when moving or rotating the camera, e.g. by showing the value and the location of this point in a footer or in the small top overlay where it shows the device name and resolution.