NelsonsLongCatch
Cheesehead
Why assume he is done? He had 7.5 sacks this year. It's a bit of a dropoff but still a good number, after putting up 11.5 in 2012. Also keep in mind this last year he was the sole source of pass rush coming from that D-line, he had no help at all.
He's a very unique talent. Not all 34 year olds are created equal. We'll see what happens.
7.5 sacks for Peppers is a "drop-off", but 5.5 sacks for Neal is a "standout, breakthrough year". Sometimes this forum confuses me.
I agree with your second point too. The other three starters on the Bears line were injured (Henry Melton and Nate Collins) or playing out of position (Corey Wotten). Peppers had no help last year.