In general, I like Brett’s guide to DLs. I have some thoughts of dubious value to add:
A. If this is for a player’s guide, the traditional player concerns are about equipment. Obviously, equipment that can be made locally will be cheap, and imports dear, but this document seems more oriented towards economics than retail. Unfortunately, I can’t see a compact way to handle that. Perhaps a table of various important gear types grouped by what DL makes it a “local” manufacture?
B. DL is significantly different than TL, and the whole TL structure is seriously compromised by the fact that most FB colonies are effectively post-apocalyptic. TL isn’t even a good guideline to equipment access since many things are supplied by self-replicating high tech gear. Perhaps something for "high tech stuff almost everyone has: biotech/genefixing/medical theory etc. Even with that, the TL relationship seems very rough at best.
C. Presumably most FB colonies at least had a plan for continued development if supplies from Earth stopped. It seems like most of these failed. I’m not sure this section is the right place to explain why, but my curiosity is piqued.