I honestly was kind of disappointed with the ending (though the extra pages that were written helped to clarify some details).
In my honest opinion, the character development train of Eren is a complete wreck.
He goes from being a hard-edge kid, to becoming family/friends oriented, then back to hating everyone and then he turns himself into a crybaby.
The thoughts he brings to the table don't justify his actions. It seemed mediocre even. He decides to kill all nations, flatten the Earth as he repeats countless times then to have a chat with Armin (who he beat up previously) about loving Mikasa.
As an Eren x Mikasa fan, this closure is alright at best. I preferred their relationship when they were fighting the titans and not Eren becoming all-mighty God of all titans.
The highlight of the final arc was Levi killing Zeke. No questions about that.