Hi guys. First of all,  I dont think that Mac Allister is RJ. Its too easy to think that. I dont know who is RJ.

Lets introduce my theory: THE SYMMETRY

First: I judge impossible the fact that Heller shows us RJ before the break and in the middle of the season. Red John's death deserves a FINAL EPISODE.

To return about RJ: I think that RJ is too smart and has a head start all the time compared to PJ. Until now RJ has always manipulate PJ and he shows that its not a simple guy who like to kill, he's a genius and a great player.

Let me ask you juste one question: Why Red John could not manipulate Mac Allister like he did with Timothy Carter ?
I think he did also with the sheriff, WHY ??? 
Because day by day , bit by bit he forced Patrick Jane to kill people. He makes Patrick Jane a Serial Killer ALSO and makes him definitely RED JOHN'S SYMMETRY.
Patrick Jane started to be the reflection on Red John's mirror. Lorelei said it: RJ AND PJ are very ressembling.  

Thats the SYMMETRY mentionned in Blake's poem.

TIGER TIGER