Observations of the Bengals offense from the Bengals Lions game

The other day I was at the Bengals Lions preseason game which was also the first time Calvin Johnson takes the field in Detroit. The crowd was very excited for football and saw some good plays. Here is my analysis for the Bengals offense in the game.
Bengals:
Offense: The Bengals 1st team offense looked unstoppable and is already in midseason form. Carson Palmer was accurate as always going 7 for 10 with 93 yards. Rudi Johnson looked pretty quick once he got around on the outside ashe started off the game with a 20 yard carry and finished with 33 yards on 5 carries. Chad Johnson had 2 catches for 40 yards while T.J. Houshmandzadeh also did well with 2 catches for 34 yards. Even though Chris Henry is suspended for the first 8 games this season, he was allowed to play. Henry was the Bengals best receiver with 6 catches for 86 yards and a touchdown. Even with the loss of Eric Steinbach, the Bengals offensive line held off constant pressure from the Lions. The big problem for the Bengals on offense is the depth at quarterback and running back. Neither Doug Johnson or Jeff Rowe looked like suitable backups for the Bengals if Carson Palmer goes down. After the likely backup running back Kenny Irons tore his ACL, the Bengals tried out 3 players at running back. Irons also showed lots of potential as he has lots of speed and had 17 yards on 4 carries. Chris Perry if healthy should take the backup role as he is a great receiver out of the backfield.