I asked another coroner about the contusions as described in the autopsy and this is the response I got. I won't post his name so the BORG won't flood himwith flames and "bash jameson" letters. Butthis was his response - unedited.

You will note that the contusion on the right is in the same area as the larger contusion under the right sided fracture and is likely related to the impact. The contusion on the left could also be related to forces from the primary impact. The findings are distinctly different from what some refer to as "shaken baby" which is a controversial topic itself.
In the presence of an intact skull pressing the thumbs into the temporal area would not result in the injuries.