I'm not sure I understand the reason for doing this. It would be great if you conducted an experiment. Freeze one cut normally; and the other with dry ice. After a week, thaw both. Have another person cook to taste and then blind taste. I'd be very interested in the results.
Your reason for using SV over the conventional approach is contradicted by your results. Personally, I wouldn't waste two hours of my time over scrambled eggs. Too much a pyrrhic victory methinks.
You mean you actually pan cooked the patty! I'm appalled you didn't sous vide it for 96 days then flash-deep fry in oil extracted from kelp found 300m undersea.
I've been purchasing lamb directly from a local farmer for years now. All-in-all I pay $6/lb regardless of cut. Obviously, from a 50lb lamb I don't get 50lb of meat, bones and offal, but the price is still fantastic. Plus I'm supporting the local economy.
Depends on how far in advance you want to make your slaw. I never salt, in part becasue there is far too much (hidden) salt in our diet, but also because there is no reason. As long as you shave the cabbage very thinly, I don't find it an issue.