I found once I got used to my disc grinder my hand sanding is very minimal. I will use disc grinder to 800 grit then start hand sanding at 600. saves a lot of hand sanding.
I also have some 1084 from a few years ago from NJSB. I had areas that were hard but also very soft areas. From 40's - 60's Rockwell. I ended up doing the normalization process they recommend on their website and now I get consistent results. Its a PITA doing this extra cycle but necessary
I want to keep this knife as light as possible because its the knife I use for cleaning fish every day during the summer. I usually spend anywhere from 1 hour to 4 hours depending on the day and if anyone there to help. The knife gets real heavy after cleaning tuna for 4 hours straight. LOL...
I also wanted to get away from CPM-154. I got some RWL34 and just in process of using it now. Only a couple folder blades and 1 larger knife started. Grinds and drills real nice. About all I can say for now but from what others tell me its a great steel.