The game has always been said to be an Action RPG, one said to have large areas to move around in and one where you can switch between party members, this has not changed, and we can see that backed up since the first propoer combat shown in the 2011 footage, the world map has been mentioned multiple times over the years too.
The paved road and gas station on the decaying terrain seen in 2010 was said to be part of the world map, and were said to be the world map section you see as soon as you leave Lucis, as the narrative itself was already confirmed in 2013 to be completely intact from what it was when it was Versus, the reason for that part of the world map having decaying terrain would be a narrative purpose, meaning they have not changed it.
The game was moved platform and a name change, but the game itself is still the same game, we already know things such as warping/teleporting and on the fly weapon switching were going to be in the game since 2006, where that concept reveal was made for us to imagine what a game where a character could do things depicted in that trailer would play like, we saw an early version of it in play in 2011, and a refined version in 2013.
The 2011 footage showed combat in certain areas of Lucis's area map, specifically inner city areas, shopping districts and crossings, and those grassy field shots were said to be part of the world map.
The 2013 trailer only showed area maps, and only certain parts of them at that, it showed only the area right in front of the main Lucis tower, this same tower which can be seen in all the trailers in some capacity, and in Accordo some places here and there, but not any of the world map.
In addition, it's still using the same character animations used in the 2010 and 2011 footage in the 2013 footage, just because it didn't show the same exact places on the area maps seen in the 2010 or 2011 footage doesn't mean those somehow aren't in the game anymore.
