The Ravens are not experiencing anything new. Whenever a coach like John Harbaugh replaces a long-time coach like Brian Billick, the team always performs better in the first season because they want to prove it was the coach's fault, not theirs. Then in the second season, everything returns close to normal. If you don't think so, just check out where Bill Parcells has gone and left. Or look at Barry Switzer when he replaced Jimmy Johnson.
One major problem with the Ravens is that they lost both defensive coordinator Rex Ryan and placekicker Matt Stover during the off season. Ryan kept the peace between Harbaugh and the veterans last season. Stover would often talk to Harbaugh and let him know what was going on in the locker room, and how the players felt about certain things. The Ravens don't have that type of communication this season and it has hurt.