IT's not just size though. I mean more like from memory a lot of the maps had tons of negative space and were just small open areas connected by hallways and invisible walls.
Like Can I walk over this hill to jump to that open area right there? Nope. Gotta go through this tree trunk (aka hallway) to the left of said hill.
For instance
It's more about openness. Which in my opinion FF14 finds really weird ways to limit. Even in more open maps like some of the sub zones for the La Noscea area they still wall off sections with invisible walls in really weird ways.
It's just jarring coming from a game that let's you walk anywhere and over anything to being restricted everywhere you go.
Heavensward helped out but it also has one of the biggest offenders in the game as well lol
I think this is the one I'm thinking of. The first town zone in Heavensward. Especially the nobles district in the back. This is an invisible wall and instanced zone nightmare. I really don't understand why this tiny town has you zone in and out of it's different districts like 3 or 4 times.
compare that to Stormwind
Where there isn't a single invisible wall nor are there any zone in/out boundaries where sections of it are instanced. You can walk into a ton of the buildings there, including the castle , cathedral and tons of shops etc. Without zoning out of the main district. You don't have to zone out of trade district to enter dwarven etc. It's all one zone.
Furthermore you don't have zone out of Stormwind to go to the neighboring town of Goldshire , nore duskwood , nor a town the opposite end of the continent. It's all one large area with no invisible boundary.
That's why I say it's jarring to make the switch. The design philosophy is completely different and imo claustrophobic. It's not really about size of map but how they use it. In WoW and other Theme park MMO's I feel like I'm actually in a world that lets you interact with it.
In FF14 I'm always second guessing if I can walk over something or jump somewhere because of the invisible walls.
edit:
Also I'm not sure the point regarding size of map+ farming it/interacting with it holds much water as it's an apples to oranges kind of thing.
Like yeah the entire world of warcraft map for Azeroth, Draenor and Outland are huge but they also give you access to portals that warp you to each location , as well as most of the capital cities really fast. In addition the mount/flying mount speed in WoW is much faster then that of FF14's (at least last time I played it). Even though the map is much much larger there are a ton of strategically played portals that make it really quick and easy to get where you need to go.
So if you set your hearthstone to a good spot (coughshrinecough) you can get to any point in the game rather quickly.