Moved some resources around based mostly on historical documentation and to make them accessible for trade (on port cities!)
Many resources in Vanilla are untradeable because they are located in a region without a port or multiple connections to other factions.
My second priority was to have at least one resource per province and two if there's is a major city nearby
Thirdly, the resources of German 4-slot regions were moved to the 6-slot regions given that the 4 slots are needed to have a basic-functioning faction.
Salt to Gothiscandza (Rugi)
Furs to Ireland (Sealskin would be better in Hibernes, but they lack a port)
Iron to Cappodocia (nice back up province for ERE plus backed by history)
Iron to Dalmatia and Dardania (Illyria was major source for Rome's iron)
Wood to Sarmatia (no resources)
Salt to Gothiscanda (infertile area and the burgundians needed the slot)
Wood to Ajax (best region for military port)
Wood to Crete (ERE used Crete for their ship-building. Best region for ERE mil port)
Wood to the Geats (no resource-region. Let us see those navies!)
Lead to Raeti, replacing wood that now getting from Ajax
Wood to Scythia-Sarai (Currently burned down)
One could try to scatter copper around the map as well, but this might cause problems that time does not allow.
Iron Region in adjacent Media Atropante replacing Silk can help the Sassanids
Lead and Marble to Bithynia
Wine moved to Asia Cyzicus
Salt replacing Iron for Romula (Gepids)
Gold added to Petrodova as was widely documented in history
Silk removed from ERE! but it is still available nearby from
Silk: Greuthingi and Abasgia (no prior resources)
Salt to Lazica
Lead to Afrighids (no prior resources)
Gems to Abushakr to allow Sass to build Goldsmith (they get sacked early though)
There might be a few others.

This is ongoing.
If someone knows how to add the copper or cloth resource from CHA into the map, I can help with that. The thought is the industry buildings can produce the resource at level 2 or 3.