Board Thread:Manga/@comment-27441457-20170608195407/@comment-26932251-20170613112810

I have to say, if Eren really is a spy now, he is a much more respectable character in my eyes. His main defining trait is that he's extremely willful, almost frighteningly so, but he's limited by the fact that he's hot-headed while also filled with self-doubt.

If he's grown to the point that he can effectively spy in a land he, presumably, knew little about (though he could be running on Kruger's and Grisha's memories) then that shows that he still has his sense of will and purpose while also demonstrating that he now has tremendous restraint and focus.