I know most of the members are pissed about the recent episode. But, I think Mcallister as Red John was a good idea that was not played out well (and I'm not saying this because one of my predictions was true). Like i said previously : 

1) He was a creep towards van pelt in s01e02.

2) He was behaving acrophobic in the first half of s06e03, but he saved Jane because he knew the list; he might have guessed that Jane somehow knew about his sessions with Dr. Miller, so he decided to swallow his fear to stay in the low. However, the bird thing was unexpected, and he did freak out.

3) You knew that Red John was afraid of birds, so enough with the BS about "why was a serial killer afraid of a little pigeon??"

So, all in all, I believe that it was a good idea to show Mcallister as Red John. The way the scene was portrayed was, however, kinda shitty....