Been loving ghosting this thread, but am sorta bummed that 40.10 (40.11 now) hasn't been graced with this awesome mod too. I still have the "Middle Earth" map, which works very nicely with the new "poles" function (set to north) and embarks changed to having 5000 sub-sections, only about 100 steps of erosion and maybe a dozen volcanoes. About the only problem I'm consistently having is that the dwarves don't spawn in the Iron Mountains on the east side of the map - DF places races in the Northwest first and even with "Playable civ required" off, I still get an extreme overpopulation of northwestern everybody and hardly anyone anywhere else.
Well, I guess "emigration" has happened a lot by the Third Age, (some thousands of years later). I usually just add "Morgoth" to the megabeasts list as a slade colossus and gen the world to 583 years in deference to "The First Age of the Sun". Playing in the Second Age seems more dwarfy, including setting up the various known settlements and civs in preparation for the Great Wars of the Rings.