all bullshit, read what some jap poster said on /a/ anime board of 4chan
the only reason AoT got ruined was because when Iseyama was through chapter 120-some Japanese government there enacted certain restrictions on media including anime-manga and all that put ban on "glorification of certain themes like genocide" and so
basically Shinzo Abe government ruined it for Iseyama
once this motion was passed and became effective; a lot of Iseyama's sponsored pulled the rug below her; even the production company got changed and they had to hire a different studio for anime in further chapters and all; it also ruined mental state of Iseyama that he rushed towards a very (local laws compatible and) politically correct ending and all
that is the only truth; rest things are bullshits slapped around this in name of this that morality whatever
in long run we will never have any other based manga again as long as this sort of restrictive things are prevaling in Japan