My interpretation on the neck harness:
1) The programmer is trying to fill in gaps in rippetoe's novice program. SS has little bicep work, and basically no neck work. Zach Evetts is an example of someone who gained 75 lbs working with rip (165-240) in around 6 months and his neck is still pretty scrawny. Some neck work would have been a good idea.
2) Grayskull wants their people to LOOK strong, not just be strong. One way to look strong is a big meat neck. It's the only muscle you can show off while wearing a suit.