I think Vontae is still a big loss. Was he an elite CB? No. But he was the best CB on our roster once he got into game shape. Brett Favre once said "That #21 is going to be something special in this league". So the talent is there, its just the lack of motivation.
Carson Palmer threw for 300 yards. You can attribute some of that to the lack of pass rush from our team, but what's worry some is the Raiders are a mirror image to us when it comes to WRs. They have no WRs. That tells me that the second and third tier WRs were able to get open enough to help Palmer reach 300 yards.
I would have kept Vontae around for this year and see what happens, then if I see no difference, trade him in the offseason with a backup plan to replace him.