I think that columns with checks for legal Standing Orders and Convoy Route Orders are appropriate. A second separate list of Standing Orders is still also redundant.
SCRP and SCUT could be moved to the Industrial category along with the SHIP command. I agree with moving PRIV to Diplomatic Orders. I agree that FORM, NFBP, NUD, DD, and ED could be included with Naval Orders.
An alphabetical index would also be nice.
In general, I feel that fewer categories are better than more categories. Separating Naval Orders into several sub-categories that only have 3 orders in them is a bit excessive. With this criterion, it would be OK to have an Exploration category with 7 orders in it. But a Convoy category with only 3 orders in it is going too far.
But that would put a lot of orders in the Naval category. So maybe it would be good to break it up a little. Perhaps a category for strategic type fleet and ship design orders, and another category for individual fleet commands.
Strategic Naval: DD, ED, NUD, FORM, NFBP, CNVR, DECF, ECNV, FNAM, FOB, NENC, NEWF
Individual Fleet Action Commands: BOMB, COLB, CONV, CSV, EAF, EXPL, FUEL, GEO, JETT, LC, LFE, MOVE, NM, OC, ORB, PMAP
RN is kind of questionable as to which category it should be in.
Maybe it would be better to separate the Individual Fleet Action Commands into two categories. Have one category for Fleet Exploration Commands, and another category for the other Fleet Action Commands.
Well anyway, the category groupings are kind of a minor detail to be arguing about. Overall, a complete listing of orders with any kind of category groupings is great!