He also let a tourist get a photo touching the controls mid-flight, which is not allowed.
Not allowed? I know there is a requirement to instruct passengers in a control seat not to interfere with controls - but I've never seen a rule prohibiting the pilot from allowing them to touch the controls.
As to the report - they looked and couldn't find anything. What else are they to say? That lack of speculation doesn't make it a crap report.
In terms of speculation, and looking at the conduct of the operation, it's just as likely that the pilot was attempting a "Bob Hoover" landing. 125 knots at sixty feet, pull the mixture and pull up for a glide reversal and landing. Ta Da!