I heard it is a bit repetitive due to the fact that i follows the manga closely, but if you haven't played the first one, it ain't that bad because a good 15-20% of the game is a retred of the first game.
Haven't seen anything on AoT2, but being a big anime fan, i found the first game boring. It basically has you going around doing things you already know will happen. Not sure if AoT2 has you going around doing Season 2 things and what not. If so, i'm gonna avoid it.