Thanks for the detailed reply, Nicole. BTW I realized that my previous post had a bit of a snarky tone, which wasn't my intention, so I'm sorry for that!
I'm really glad to see sewing machine maint in there. Given that other badges focus on hand vs power tools, I wonder if people could be encouraged to try a project on a people-powered sewing machine (treadle or hand-crank). They are surprisingly common once you start paying attention to them - in my small town (13K population, ferry and air access only) I bought a secondhand treadle, was given one from the 1890's by someone I met on the bus, offered two more for free that I didn't have room for, know half a dozen people who own one, and have seen another half dozen offered for sale... in the last 2 years. So even if a person didn't want to own one, they might be able to borrow one or spend time on one.
I do agree with a previous poster that knitting a single sock is more likely to take 5 hours than 2. I've knit somewhere between 40 and 50 pairs at the moment, and I'm a medium fast knitter, and my time is closer to 5 hrs per sock.
I was mulling this over while I planted the squash last night, and it struck me that the stickwork list is much more about products than process/skills, compared to some other areas in this badge like prepping fleece. As a result, someone could get their 5 points using garter stitch only, and never learn even basic skills like purling, increasing and decreasing.
I know I'm too late to affect this badge anyway! I am more thinking aloud and for feedback, because I will be adding Textile badges to my own merit badge program sometime soon. (Currently working on Baking :) )