I think that some of the examples that you stated are examples of harassing fire which would not be at all that heavy.
However where were most of the solders in the barrages that you mentioned? In the cellars, which aren't currently modeled in CM and these cellars provided most of the protection. The closest that we have now in CM are concert pillboxes. Ever tried taking one out with a 105 barrage? Perhaps this feature will be modeled in CM2 along with tunnels, trenches, anti-tank ditches, man-able pill boxes, tile specific weather, and all the other goodies that we are all hoping for.
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A 2x4 and a kind word work better than just a 2x4