No it isn't.
Yes it is.
Let's suppose this is their goal; forcing players to encounter frustrating circumstances in order to...what, know where a boundary is that they can find on a map? One that they can fly over once they get all the aether currents? Your supposition that the frustration is intentional makes no sense, especially when these oh-so-important boundaries you love so much become trivial the moment flying is unlocked. They want the game to be fun--why would they force people to encounter difficulty just to allow them to fly?
Furthermore, let's say you were to wait until you unlocked both parts of a zone before going to pick up all the aether currents. You would encounter the exact same difficulty of being led to aether currents you can't access. The only difference being that you could, at that point, teleport to an aetheryte on the other side--but then you have to navigate back, and the whole ordeal just becomes a huge pain in the ass.
This is an appeal to tradition. Just because there is a way to do it now that involves slightly less frustration does not mean that this is not a problem worth fixing. Again, why do you care? If this system were implemented, you could continue to play the game your way, but those of us who try to do our mandatory exploration as soon as we can would be able to play the game our way. "Just play the game this way" is not an answer to what feels an awful lot like a bug in the design of the system.
Yes we are, because this would be an interface fix.
Unless you have not introduced yourself, you are not one of the game's developers or designers. You cannot know this. There is no possible way that you can make this assertion with any certainty. They have said exploration is a goal of the aether current system, but they have never once ever said anything about making a system that is intentionally frustrating. That is absolutely counter to the way that the developers of this game think. They want things to be painless, so that we can enjoy ourselves, and they want to respect our time (which is so often limited). Just because you have perceived a way to operate within the system with low frustration does not mean that the frustration from not operating that way is somehow intentional, and I find that assertion to be absurd.
Name any other system in FFXIV where misinformation and misleading and tricking the players in such a way creates a fun and engaging experience. Besides hunting aether currents, name a single instance where, in your estimation, the devs have created a drawn-out systematic deception. I think you'll find that there are precisely none.
"It's just part of the game" is exactly the same as "it's just how things are," which is the literal definition of an appeal to tradition.
Also, what ad hominem? I can see no motive to your arguments or your zeal for this cause outside of contrarian belligerence, so I called it as such.
EDIT: I'm done arguing this point. It's clear that we've both stated our cases as well as we can, and while I am somewhat frustrated that we could not reach an accord, I'd rather not spend more energy on this, and will trust SE to make their own decisions about what's good or bad for the game, quietly hoping they agree with me.