Firstly, I'm ready for this to be an unpopular opinion for lovers of this genre or the world of Final fantasy. I am giving my opinion as someone who normally does not play MMO's but really enjoys the dungeons in FFXIV but no other parts of the game. I first played this game in 2015 and LOVED it. But the complexities of the maps has increased 10 fold since then and FFXIV's dev teams ability did not rise enough to complement it.
I understand that unlocking flight in each area of the game only takes around 30 minutes, 15 minutes to do the quest, 15 minutes to find the Aether currents. However in many of the areas I have played in so far it takes an additional 30 minutes or more to get because of aether currents that are given by MSQ's vice side quests or are locked in parts of the map that you cant access due to the MSQ, ultimately intending for you to finish the MSQ in that area before unlocking it.
In most games I wouldn't be bothered by this since Maps are High quality making it easy to find your way around, or the maps are just relatively simple to navigate. In Final fantasy this is not the case. The zone maps in FFXIV are poorly drawn and labeled giving the appearance of "False paths" that should be there based on the map, but factually don't exist. The world of final fantasy is BEAUTIFUL; but no matter how beautiful it is, I lose my mind when I see constant issues of poor map design and knee high unscaleable ledges. I understand most people will grab my gripe with flying and ignore the rest, but the core of my complaint here is: Final fantasy does not do a good enough job designing their maps or parkour mechanics to justify limiting flight without the addition of some sort of guiding tool or parkour ability(I'm serious, even a simple thing like a higher jump or the ability to climb over a waist high ledge would fix 90% of this).
I would also like to talk about those MSQ's. The quests themselves are terribly boring. Fetch items here, kill mobs there, fight 30 some odd enemies while our unlimited mana healer protects you. Honestly, it seems like the quests are nothing but filler to get you from cutscene to cutscene. At any rate it is obvious where square enix funnels all their creativity. But this is forgivable, and I want to point out the unforgivable. Mob density in this game is absolutely insane. Before I started using stealth with a gathering class to help, I usually had to fight 10-15 enemies unrelated to my quest just to get to the location. On more than one occasion I failed a fight in a quest, not because of the mobs SE intended me to fight, but because of random mobs that got aggrod while I dodged an AOE attack or more frequently, respawned on top of me because the last guy to do this quest killed them before hand since it was the only way to do it without assistance. All of this combined just creates a grind to get you to put in more hours and pay them more money in subscriptions.