Interpreting the context of the narrative from this episode is that in life at times we may or can open up choices to take and there are other times that we cannot choose simply because choices either were non-existent or closed away from our grasp at the beginning.
Now, with a vast majority of the jigsaw pieces assembled the truth got clearer but still far away from our protagonists' grasp for the time being.
Grisha Jaeger still remains a mystery figure as to his motives for what he stole from the Reiss Family, but it cannot be oversimplified due that he hadn't a choice. Simply put, he had to move forward to reach a goal, and a choice was something he could not afford may be because he was hard pressed on time.
As for Historia, I liked her resolve to choose to become Queen on the condition that she will lay her life on the line her fallen comrades did, and her living comrades are about to do so. Her take on that matter is a vast improvement from the manga material; an important narrative in her characters that Isayama-sensei desired to have fix in the anime.
Now, as much as Eren felt worthless and wimpy with his bitching and crying, he should have recalled that for him to die or getting killed isn't a choice to make alone. The Scout Regiment and him have been in all this chaos together caged within the same Walls.
Luckily, in time of very need, Eren realized his own selfishness and discovering an unexpected treasure granted him the hardening ability for his Titan.
So, next episode brings forth the Battle of Orvud District against the Rod Titan being the most massive Titan ever in history that Humanity has ever challenged.