Happy to see your project is ambitious as ever, 
Especially when you have the progress to back it up. Any plans of going all Dwarf Fortress and generate random history/famous figures and battles? The lack of updates in this thread had me worried that your progress had slowed down, but it seems like you are making quick headway. If I was in your shoes I would begin implementing gameplay elements like unit movement, combat etc. sooner rather than later. Being able to actually play a game (if a rudimentary one) on your map might give you insights that might lead back to improvements in world generation. By the way, I know you want to build everything from the ground up, since that is the best way to understand the systems you are using, but if you ever want ideas or inspiration I’ll send you the newest version of my toolkit free of charge.