A member of the Pretty Little Liar cast said recently about A (their equivalent of Red John) "Everyone will freak out because it's so clearly in every episode," he adds, laughing. "When it's finally revealed, you could literally go back to season 1 and knowing who it is, you can be like, 'Oh, wow. Whoa. This has been here all along, and I never noticed it,' which is, I think, brilliant."
To those who still don't understand that some of us are annoyed by the "little reveal" it is because we expected exactly that, to freak out, to think to ourselves "Wow, crazy, brilliant" and to watch it again thinking "Wow, crazy, brilliant". In a word we had expectations.