If this ends with the Eldians and the rest of the world making peace, I'll call bullshit. Yes, the world was almost destroyed, but without Eren, and the developing of technology, the Eldians are doomed to death eventually. There will be no reason for the Marleyans or the other nations not to wipe off Paradise. There's a hundreds of years old hatred, that can't be solved with a happy-go shounen bullshit move. So yes, they stopped the rumbling, they saved a lot of lives, but they have fucked themselves in the ass ultimately.