There's a stark difference between panic and the realization that you have a glaring gap in a place where gaps are not good to have.
Defense will get better - as stated, the Bengals and Palmer play 3-4 defenses all the time - if anyone was going to expose our squad it'd be them. Raji will get healthy, people will get more assignment-sure. That's perfectly realistic.
Offensive skill positions are good - Grant isn't AP or anything, but with decent blocking he could provide respectable production, which would be plenty for Rodgers and the receivers.
The big glaring gap is on the O-Line. How they managed to look so stellar in the preseason is beyond me - hell of a bait and switch.
It needs to be fixed, and that's not panic talking - that's acknowledging that the team will go as far as the O-Line can take them, and at this point that's looking like nowhere.