What is even going on anymore. It's a completely different manga at this point.
Which is awesome.
In fact it has been changing from the start.
-At the beginning, the horror aspect was stronger, but it diminished to action once Eren transformed.
-Later the part of mystery and thriller increased as it had more focus on the mysteries behind the main plot, with new secrets teased along the way.
-Even later, the series stopped being focused on Armi/Eren/Mikasa and now it feels as it's telling a grander story about the conflict itself, with many other characters like Levi, Historia, Ymir, Reiner, Erwin, Zeke, Hange, etc had more presence, in some chapters the original main characters haven't even appeared.
-There has been also good tragic moments with the origin flashback part.
-And now it surprise us with more military action, an even bigger international conflict where the original character are only a small piece of the puzzle.
And all these changes are not done at random, the main story still feels unified and singular, cohesive. It's just that because he is only following that story, the comic HAS to change as it follows through. If one point in the story needed a civil war to defeat the monarchy and more focus on internal politics, the series stopped being about giant zombies for that arc, because the story said so.