Schoch and West have looked carefully at the erosion around the base of the Sphinx. Their conclusions seem too solid to ignore, that the erosion had to happen when there was abundant rain on the Giza plateau, and that would have to be more than ten thousand years ago. When one looks at the Sphinx dimensions, it is silly to assert that the face and body were carved at the same time, by people who took great care to NOT distort dimensions when building, decorating. Anthony West is a first rate researcher, and it's silly to dismiss his theories just because they don't fit the 'established' notions. Such perspective on the nature of the solar system (historically) is an example of how 'established' notions can be fundamentally flawed and in need of major revision ... masses of evidence were ignored and put aside because they didn't fit the established notions.
The present head is not the original head, but is cut down from the original head to about half the proportionate size. In addition, the neck is not smoothly faired into the body anymore but was chopped to fit the present head. The original head was of a lion, there being enough material in the original yarddang outcrop, and when the muzzle either broke off due to weathering, or was cut off to put the human face on, most likely when the body was buried in sand as it was until recently, the proportions of the rest of the body were ignored.
The sphinx looks to me like it was built once, possibly as a complete lion (head and all)
Then it got its bottom third worn away by serious water erosion, then got buried up to its neck.
Then the face that remained was eroded away some more. So much that a pharaoh decided he would carve his face onto what remained sticking up out of the ground, possibly never knowing what was buried.