Here is the summary of the 1st article:.
• Cut down on turnovers and penalties
The Bills had 34 turnovers a year ago, including 17 interceptions, and their inability to take care of the football and to protect their defense are big reasons Ryan Fitzpatrick is no longer the QB. A total of 104 penalties in 2012 is far too sloppy, and the team also must improve in that area.
• Improve run defense
There is a lot of talent on this defense, especially along the defensive line, yet the Bills were almost at the bottom of the NFL in this category. This new coaching staff will work hard to fix it.
• Play better defense on third down and in the red zone
Buffalo was 31st in the NFL on third down last season, which allowed opposing offenses to keep the ball and control time of possession. In the red zone, the Bills were especially poor, allowing 38 TDs in 55 trips (also 31st in the league).
2nd article is a bit long, don't want to copy the whole thing.