Your region's Graphics with proper railroads, river ways and names added/modified/removed are welcomed !
Just post here the final zip file with all of them, please.
I will then update the region database so that the game understand the Amur river "moved" north to Khabarovsk. And remove also the railroad movement from Karemyy region and add it in Smidovich.
I guess the Red players will be happy to find a new swamp region were to cut the transiberian railroad in the area...
About fluvial navigation on a little part of the Far-Eastern theater, i'm not sure we could do it : it is much more data and design works ...for just few regions and maybe not an accurate historical simulation (river navigation means inRUS rivership and gunboats units, ports, etc...and i'm not sure that the Amur small part displayed in the game deserve a design of the same level of fluvial industrialization and strategical interest than the Volga).
I saw also your proposal about flags : i'm very interested to have an other flag for the Eastern/Siberian Whites.
As you said, the Kolchak one's don't fit for the year 1918. And after all, since it is planed that the Kolchak Regency became a Political Option in the Politics Ledger.
So i'm looking for something like the Northern Whites or North-Western Whites sub-factions type : some images with the historical three-coloured Russian flag but with a specific little icon on the top left ...which could be the Siberian Regional Green and White flag.
If it is fine with you to help, all the MODed images needed to include it in the next patch will be welcomed too.