What is the falling out between Tullian Tchividjian and The Gospel Coalition about? Recently there has been a falling out between Tullian Tchividjian and The Gospel Coalition. Tullian Tchividjian was requested to move his blog away from The Gospel Coalition website.

Can anyone summarise what this falling out is about? From The Gospel Coalition's announcement below it appears that the issue was about sanctification, but none of the pages below link to where he wrote about it. What exactly did Tullian Tchividjian say that TGC disagreed with?

Some links:


On some recent changes at TGC (The Gospel Coalition's
announcement)
“I’ve come to set the captives free” (Tullian Tchividjian's announcement)
Reflections On My “Break-Up” With The Gospel Coalition (a follow up post by Tullian Tchividjian)
Tullian, in his blog, mentions that over the past several years he felt the messaging of the Gospel Coalition had changed (he used the word "morphed") to the point where he was finding himself for drawn to Liberate's specific message, also saying that


  "So, now is the right time to pull the trigger. In fact, it's probably over due.


It was also noted that he publicly criticized (and I say publicly because it was an interview, which was made public) members of TGC for their defense of CJ Mahaney:


  "the good-old boys club covering up with own"


as well as


  "I've just been sort of disgusted by the whole thing."
  As well as alleging that CJ Mahaney knew about what was going on.


We then have Tim Keller and Don Caron who said he was "asked to leave" because of the sanctification debate, which they said it was becoming apparent that "the dispute was becoming increasingly sharp and divisive."

Tullian said his decision to leave was his own, but the timing was TGC's doing. According to him, no one had even said anything before he was told to leave:


  "No one ever said anything to me from the Gospel Coalition staff, not Don Carson, Tim Keller, the president, the vice president, no one from the Gospel Coalition ever even uttered a word about concern, which is why, when I was told 'You need to go immediately,' I was shocked."


Tullian does not believe it a result of clashing theology, and he himself summed it up best here I think:


  "Theology is not to blame here. You can't blame theology for the way that you handle it. It's good theology in the hand of bad sinners. That becomes dangerous," said Tchividjian. "When the Christian faith becomes little more than theological propositions and categories, you're not actually thinking about how theology serves people, it can become divisive."


http://www.gospelherald.com/articles/51352/20140524/tullian-tchividjian-refutes-tim-keller-d-a-carsons-gospel-coalition-statement-on-his-exit.htm



EDIT: Here's a little bit more from his article with the Christian Post. It appears TGC started taking on a very critical, we're right-your wrong vibe that he didn't agree with. The following is an excerpt:


  Tchividjian believes that some at TGC have adopted a very critical tone. “I think that’s their tone. That has become their tone. That’s not the tone of everybody there but that is the tone of some prominent voices there: critical, very, very quick to point out what’s theologically wrong out there, very slow to pick apart what’s theologically wrong in here in terms of their own position … and I think people pick up on that,” he said.
  Tchividjian, who considers himself Reformed, noted that just because these voices also considered themselves Reformed, one should not see their behavior as the fruits of their doctrine.
  
  “Theology is not to blame here. You can’t blame theology for the way that you handle it. It’s good theology in the hand of bad sinners. That becomes dangerous,” said Tchividjian. “When the Christian faith becomes little more than theological propositions and categories, you’re not actually thinking about how theology serves people, it can become divisive.“
  “Anytime you associate yourself with a movement, you think that is at the center of the universe, and there is a much larger Christian and Evangelical world out there that is now looking at The Gospel Coalition, which seemed to start out as a positive movement that was for Gospel centrality and cultural engagement,” continued Tchividjian. “And now the tone from all the people I hear and my opinion is very much ‘what we’re against.‘ People just aren’t attracted to that.”