Changes to the fan maps that I think this map suggests:
Locations and shape of Genostel and Umryg (natch), shape of Western Seven Cities, locations of Perish, Cabal, Shal-Morzinn and Nemil.
Quon Tali should be slightly bigger. How much bigger is unclear, as this map exaggerates its east-west size which was clearly later rethought (as both the HoC and TBH/RotCG maps suggest). Maybe 5% or so.
Korelri/Stratem should be notably smaller (10-15% maybe). This map suggests that the scaling of Malaz Isle to Korelri in Stormwielder was correct after all.
Genabackis should be significantly bigger (like 15-20%), so Seguleh Island is due west of Kartool (as was also confirmed in Deadhouse Landing). This throws up a major headache in the sense that the previous arrangement allowed for a very satisfactory stretch of open sea (the Reach/Reacher's Ocean, including Laughter's End) between Korelri, Quon Tali, Genabackis and Assail. Making Genabackis and Quon Tali bigger and Korelri smaller throws this relationship into some confusion, in particular parking Seguleh Island very close to Fist Island (you can tell I've had fun shrinking and expanding the existing maps trying to make this work and it gets a bit urgh) and almost closing off the sea off NW Assail (despite this clearly being Reacher's Ocean in the Assail map).
Assail, or rather Bael, is bigger. Not massively, but we had the south coast immediately below the Assail map, whilst this one shows it some way to the south of that (and extending further south than Stratem).
Jacuruku is bigger (rivalling Korelri - but not Korelri/Stratem - in size) and further west (which tracks). I think SE's map probably places it too far west. Jacuruku isn't on top of Kolanse (as evidenced by the text or The Crippled God or Blood & Bone maps), but it certainly needs to be larger and more centrally placed in the White Spire Ocean.
Western Seven Cities is spookily on-point, but just needs adjusting to the configuration on this map (two large peninsulas with the Clatar Sea between them, Perish is the far NW peninsula).
Apparently there is a hitherto unknown continent at the south pole, with a large extension up towards Assail.
ETA: Close examination of the Kolanse/Estobanse area seems to confirm that the body of water on TCG map is not part of the Bluerose Sea, but instead a big lake. The original world map shows the exact same coast as the northern end of the map in TCG proceeding around in an arc and becoming the coastline we see on the edge of the RG/DoD Lether map. I always wondered if that was the case. Aha!
This post has been edited by Werthead: 16 August 2018 - 10:57 PM