You are thinking too much. With the spoilers that came out it's quite easy to figure it out. Gale Bertram is Red John, you just have to ignore the descriptions of Red John i guess.

When he appeared in season 3 Jane didn't like him, you have the fact that Red John is a showman, and Bertram first appearance was surrounded by cameras, making a speech. You have also the mall scene, which they can throw in as a flashback. Bruno said that we were going to see Red John's face, everyone thought it was Timothy Carter, but in fact it was Bertram. In 6x02 we see Bertram walking like he was limping and we know Red John walks this way, and Patrick staring at his walk. I really think it's him