This seems like one situation where the planets align and everyone does their job right and it still led to disaster. Think about it:
-Marketing did their job right by sending the script to engineering 3 months before the commercial was made and getting approval before making the video.
-Engineering did their job right by actually watching the video and trying to make corrections.
-Wally did his job right by reading the script and commenting in what he thought was the appropriate way.
This company is just screwed no matter what they do.