Season 6 for me has been like this so far:

Episodes 1-7 :    Good (because I still had hope)
Episode   8   :     Shit
Episode   9   :     Good (because I enjoyed watching another side of PJ on the island)
Episodes 10-18:  Shit

So that means out of 18 episodes 8 have been good. (for me).
Even if the last one is good (if a miracle happens), we can still safely say this season has been shit.

 I've never followed a show where the final season was this bad. In Dexter, even if the last episode was shit, the last season wasn't an embarrassment..The same with Lost..

My point is: Do we really care anymore? For example if Stiles or Haffner shows up in the last episode, are we going to be happy or are we going to think they are insulting our intelligence?

To be honest I'm not sure I want anything else to happen about Red John.. I feel like they already messed it up like I didn't think it was possible, so I don't see how one episode can make everything alright...It just doesn't. The ship has sailed..Don't you agree?  

(And yes, I used to be a huge Mentalist fan, I've never loved any other show more than this one..That's why I'm still writing here because I feel so cheated..I'm starting to really like Hannibal, but it's not the same..In the future, I will still happily re-watch seasons 1-5, but season 6 never again! :D)