I was very relieved when I explored 2 of the Mistlands areas I had slightly explored prior to the update. One was just a little strip of Mistlands which I never actually went into, but while venturing in the Plains most of it was uncovered but only barely to the edge of the shoreline, leaving the waters beyond unexposed on my map. After the update there was around 50 islands out in the ocean, with quite a few Dvergr docks, outposts and 1 mine and that after only exploring about 1/4 of the islands. Many land masses I had found, built bases with portals, but not fully uncovered, had Mistland biomes generated in the portions of those land masses I had not explored.