The footing blocks are meant to float, but that is a relative term. The pea stone (or fine crushed stone?) and stone dust under the concrete blocks looks like it is compacted and leveled (though at different heights).
I don't think they will change the angle, though I could be wrong. It is fairly flat which makes me think that they are optimized for the summer so they can be at their highest output during the peak power demand for A/C.
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