The early fumble and the early interception putting them in a 14 point hole hurt them. I did like the increased use of Rudi earlier in the game. The first few series, Palmer looked pretty bad. Using Rudi on subsequent drives seemed to help calm Palmer down and slowed down the Baltimore pass rush. I think it might have been a different game had the Bengals not been down by 14 within the first 5 minutes.
The Bengals had a bad no-call on that 4th down late, and a nice pass defensed by the umpire on the previous series. They may well have won the game had one of those two plays turned out differently, but maybe they wouldn't have been down by 6 at the end if they hadn't coughed the ball up so early.