Hah, I'd just noticed that while rewatching the trailer. It uses the same design as Fran's map, incidentally.
Also, the Anchorite at Corvos intrigues me. From what I know it's the remains of an incredibly large statue on the Ilsabardian side of the Corvos Narrow. The fact that it's pointed out in the world map is what makes me raise an eyebrow.
Except they've done that before. Starting
here, we'd seen the first trailer for Stormblood at FanFest, then at the final FanFest they released that trailer, where the clouds moved first towards Othard and then revealing Hingashi.
Note that even if the whole landmass is revealed it doesn't mean it'll all be explorable. Look at the Othardian map and you'll see PLENTY of places we haven't been to, yet, nor can explore. The Dalvanth Grath, The Knowing Sea, The Unpromised, whatever the heck Blindfrost is. The whole Isle of Koshu in Hingashi. Hell, we've had Thavnair and Old Sharlayan and Aerslaent revealed since Stormblood and haven't set foot in either, yet. We're barely going to Paglth'an in 5.5 as a dungeon when on the Eorzean map it looks about as big as MOR DHONA.
Edit: Also, the Burn looks larger than Yanxia and we still go there... for a Dungeon.