While I agree with many that the reveal episode (6:08) was something of an anti-climax, with probably the least interesting suspect turning out to be RJ, it really was time to wind up the RJ storyline.
And to all those who are disgracefully and offensively lambasting Bruno Heller and crew on this site, sit back and think for a minute. They were skilful enough to develop a complicated storyline that lasted more than five years. But I can think of several books, TV series and movies that built up a story quite brilliantly, so much intrigue and plot development, but then failed to deliver on the ending. It seems the Mentalist Red John story is no different. But give BH some credit. He may yet surprise all of us.
I doubt we have seen the last of Visualize (or even Brett Stiles - Malcolm McDowell is such a good actor!).
But I actually thought the Mexican episode ("two years later") was fascinating. Have a little faith people. The thought of Jane working with the FBI has a lot of potential. You all waited more than five years for RJ to be uncovered. You can wait a little bit more for a good show and great characters to be re-directed.