The anime made stupid changes in the last episode:
a) moving around events and ruining a huge plot twist and the character's reactions about it.
b) pandering to Levi's fangirls by having a pointless action scene that goes against Eren's characterization so far, after spending some minutes just standing there and just staring. He doesn't move in the manga for a very good reason: he can't, his legs were broken earlier.
That and the fact that they padded the previous episodes with pointless filler (last justified filler was ep 22) just to fit in those asspull Levi fanservice moments. Oh and to make place for it they removed the plot twist entirely save for a split second joke scene in the very end.
The manga is crudely drawn, but it's still promising even though there's a complete and somewhat confusing shift in the direction going on, after the author decided that "Humanity goes extinct, protagonists all die" wasn't a satisfying ending after all. The spinoffs though are ridiculous.
I prefer Arakawa's Arslan manga, tbh.