This
article has more info [MyAJC link]. Comments below are my paraphrasing and have some bias.
Regarding D: He said he was disappointed with the performance of the D. He said the scheme we had was clearly not working, especially as regards pass rush and sacks. Said we blitzed about 26% of the time and weren't very good at it. Said that maybe we should consider bringing 7.
Regarding QB: Hinted (without naming names) that JT didn't play as well as he expected, but that it was more a function of the players around him. Said that JeT is really hard to sack and he makes the pass protectors look better than they are. Said that the fact that we didn't get sacked much was more because of JT than the pass protection.
Regarding ST/Parting of ways with Ray Rychelski: Felt like a dedicated ST coordinator hadn't been worth the payoff. Said that kickoff return was abysmal and we must have set a record for the number of times we started inside our own 20. Said Rychelski is a very knowledgable ST guy, but it just wasn't working out for whatever reason. Said that he had done the experiment and seen enough to know that he wanted to go back to his old way of doing things with two OL coaches. Said that we will name a ST coordinator from within the staff. Said that this has the added advantage that different special teams units have their coaches' units well represented.
Regarding O: Flip flopped a bit on this one (atleast to me). Or more likely it's just a complex interplay of variables. Said that youth was the big problem. Talked about linemen run blocking instead of pass blocking, especially with the no-huddle stuff. Said that Freddie Burden was a warrior and played hurt most of the season. Plus dealt with off the field stuff that CPJ wasn't sure he himself could handle. Talked about scheme for a bit, but then flip flopped and said that the same scheme had been working prior. At one point, talked about hot reads and said that other teams may have figured out our hot reads on some protections. Then a few minutes later, turned around and said that wasn't the problem.
Interesting observation from CPJ: If you are the coach of the 2014 team and were asked if you wanted the ball on offense or defense to win the game, which one would you pick? The starting field position will either be your 30yd (if you pick offense) or opponent will start on their 30 (if you pick defense). Now what if you are the coach of the 2015 team? His point was that the O wasn't good enough to carry the team this year and the D wasn't that much better to make up for it. They were both equally mediocre.
Overall, he seemed determined to fix the problems, which I liked. Said we have to learn from our mistakes and fix things.