When comparing ourselves to the world, then we're just tiny bugs living on borrowed time and cannot fathom the many dangers and marvels with which we live everyday.
We believe that our lives move on unceremoniously and thinking to ourselves that what our eyes can see pretty much sums up our environment. Then, you wake up one morning that something that should not be there or sticking out of the place appeared out of nowhere, and that something instills within you a sense of fear due that it has defied your sense of conformism and knowledge.
One moment you thought you knew your world, then at the next an incident happened that forced you to face the limitations of your knowledge. Hence, rethinking your position at how small you are in comparison to the rest of the unknown world will be inevitable.
RIP Erwin, you died with your subordinates in other to lead humanity to the greatest discovery of their existence. Your death was not in vain due that humanity finally found out the answers you yearned for in life.
With everything said and settled regarding Armin feeling insecure and anxious whether he will be up to the task, along with Hange, for them to fill on Erwins' shoes or not, the awaited moment couldn't be delayed anymore.
I do agree that the anime, unlike the manga, did not cut straight up to the basement but instead the animators took the time to build the pacing as we watched Eren and Mikasa walking the deserted streets of the ruined Shinganshina. Their walking their way to the end goal awoke within them memories of their childhood like seemingly happened just yesterday and yet so distant and fleeting.
The build-up was appreciated for both it delivered a layered sense of tension as our characters were reaching the ruins of the Yeager home and to remind the audience how much our heroes lost that day not only loved ones and their home but also their childhood as well.
And, yes, I thought how brilliant Isayama was trolling both his characters and the audience:
1. First, the key not fitting inside the lock of the door leading to the entrance, until Levi forced the way by kicking it open.
2. Second, the drawer seemingly empty at first, until Levi (again) pointed out the fake compartment where underneath lied the journals left by Grisha Yeager.
Double trolling, and yet put into effective use.
Anyways, with Erwin gone it was naturally for Hange assuming the position as the next commander of the Survey Corps, hence, she naturally had to accompany both Eren and Mikasa to be there at the unveiling of the truth. Finally, Levi came as well I suppose because he took on the burden of Erwin's wish to see the truth for himself as a way to owe Erwin back and be there for that moment in Erwin's stead.
What they found out from what Grisha left was that not only the human race has survived from beyond the walls but thriving as well in an advanced civilization.
From what looks to be the start of a memory story arc with a young Grisha as the protagonist, my initial reaction is of both shock and amazement at how the cruel and unforgiving world of
Attack on Titan has unfolded and expanded its boundaries and settings vastly beyond the walls.