Could you post a full, zoomed-out map? It could potentially help. Here is my list of things I saw (note that it may overlap with others' suggestions above)
Your desert is missing spots in Thirsty River (south and west borders)
Mineral springs IDS cave (very northeast) is missing
Lots of spots on Iron Mines (northeast, as well as western border [mostly southern part of it])
Frozen Forest northern border
Area between Ice Caves end and Ice floe, almost immediately west of the "boat" thing, seems to be lacking
Southern area of Ice Caves mission
Southeast corner of Ascalon [pockmark flats]
NW area of fork ranik (look closely at my map and yours)
Area barely south of Ascalon City, the east "coastline" of whatever that liquid body is there.
Eastern "mouth" of the Surmia tar river thing, and more of the north tar lake
SW corner of GReat Northern Wall zone
Your Diessa looks more complete than mine at the northern edge, I'll have to check that out on my map
Redo Nolani, both the southwest area (not the fort, the other southwest) and the northwesternish area
Yay found another spot I need to reveal more of, in the en-rout-to-gates-of-kryta zone! Thanks
Eastern edge of the Ice Caves zone, deldrimore bowl
Guess I need to do Kessex Peak again.... /sigh
Weird Peninsula Thing of Stingray Strand can show more
Tameek north edge
Northern edge of Nebo Terrace
Very NW corner of Divinity mission (sucks)
Hell's Precipice mission
[your bloodstone / wilds image wasnt fullscreening for me so i didnt look at that one]