Actually…no. I’m not annoyed by John’s character development, nor am I disappointed.
I take it from the way you’ve phrased your comments that you wanted to see John become closer to Sherlock, and “step out of his comfort zone” to do so. I’m not sure that’s fair to John, to be honest. I think he does the best he can with the information he has. In fact I think he goes beyond that, I think he bends over backwards, given the information that he has.
To me, series three demonstrates that Sherlock is a) probably gay, and b) completely in love with John, and that John is a) completely in love with Sherlock, and b) pretty confident that that’s unwelcome information. That’s character development I can get behind.
Shall we walk through it then?