We have a different definition of "awesome plot twists", as soon as it was revealed that all the titans are just weapons from another nation I lost almost all my interest. Its the same shit in zombie survival shows when zombies become second fiddle to other human survivors. The zombies/titans become just a tool in a pointless conflict.
AoT was pretty good when it came out, then season 1 ended and we got a long gestation period to realize its not as good as it looked at the beginning. Then the extreme lazy reveal of the armoured Titan and the colossal Titan showed the author's hand at how lazy it would be going forward.