Actually the oppoosite, it was written by a long time writer Brian Iles. He wrote a lot of episodes in the late 2000's and I think has written some of the best episodes in the second half of the shows run.

I've watched Family Guy weekly since pretty much it's second revival and while I think the decline in quality happened later than most people say, there was a real decline in quality. I think about 3 or 4 years ago it got pretty bad. But these last two seasons have been pretty good.