Culpepper looked horrible last year BEFORE getting injured. And when Brad Johnson came in, the Vikes' offense looked MUCH better with the same personnel. Given that and his horrible injury, I just don't see him returning to the days when he had Moss and Scott Linehan as his OC.
Speaking of Linehan, he was the Dolphins' OC last year and did a great job for them. Losing him was huge, and coupled with them hiring Mularkey to replace him, it's a HUGE downgrade for them. Then add the QB situation (Culpepper on the downside, Harrington a scrub) and losing Ricky (half the Dolphins' rushing production last year), and they should be worse, not better.