I dont think Eren is finished with this. We didnt get to hear him drone on for an entire chapter of why what he was doing was right. Although he was clearly wrong, this manga doesnt pass up a chance to give us both perspectives. If Eren survived and will have a final stand where everything goes to shit anyway, I'd be annoyed, but I know the type of story this is. First things get worse before they can get better. Not to mention that Eren technically could have prevented any titanization from happening, so he was aware of this outcome.
I really appreciate how Armin's joy for the world actually overcame Zeke's nihilism. As always, the issue is that some people need a higher purpose to life and despair when there is no inherent meaning to existence. It makes the suffering feel completely pointless. But the truth is that we create out own meaning in life. Even if it may seem meaningless to everyone else. Maybe this was the difference between him and Erwin and why he was the "correct" choice all those years ago.
Big fan of how Levi didnt even hesitate for a milisecond to decapitate Zeke. The man had a mission and he went through with it.