I always watched The Mentalist because of the Red John storyline. Obviously this turned out to be a huge disappointment. Just like so many other shows, The Mentalist failed to tie loose ends. The Red Story line took 8 (!) episodes, but the final episode ended in a rush. Without answers being given. The pidgeon, the Latino, Van Pelt, Rigsby, ... it was so absurd.
I have more bad news, for those who prefered the Jisbon storyline over Red John... Check out the promo for next episode: http://www.youtube.com/watch?v=_B9i6ZYwt48
It looks like there won't be given any more answers about the RJ saga either.
My interest in this show is gone, thanks for all the theories, I enjoyed them very much!