I think they should be significantly better but there are a few things that could hold them back:
1. Who is their featured back? If they can find one (Fargas?) then that will take pressure off of Gannon. Plus Norv Turner loves to run the ball.
2. Will Porter return to form? We saw last year what his absence did to the team. His speed keeps defenses honest, and opens the middle of the field for Rice and Brown. I'd also like to see if Jolley can return to the receiving TE he was 2 years ago.
3. Norv Turner. The guy doesn't have a good track record. That doesn't bode well for the Raiders.
I think they will be competitive. It is just a matter of how competitive. I hope they sign Collins BTW.