I think the story is going great. Everything after the Marley reveal has been excellent and far exceeds any previous arcs focused solely inside the walls. I also think everyone oversimplifying both Eren’s side and the Alliance’s side is doing a terrible job consuming this manga; as there’s a lot of thought put into exploring these issues beyond just saying genocide is bad.
What’ll really solidify this series is the ending. As much as I find the entire series genuinely fantastic, a happy ending will kill it for me. There’s just no way for that to make any sense narratively. I have faith that won’t happen, thankfully.