This is the main reason I agree with the original poster--I believe that Ernest Jones, Derick Hall and Boye Mafe will play better than they did in the Week 16 game against the Rams.
Ernest Jones injured his knee in November, and missed two games (week 10 and week 12?). He came back to play well in the first Rams game (week 13), but really wasn't himself from weeks 13 to 17 when he had the lowest PFF grades of the season (37.0 vs. the Rams). He now seems back to being himself. (Btw, Jones wasn't himself in the first Rams' game either and probably shouldn't have played.)
Also in that game, Mafe (31.1) and Hall (50.6) both had their worst game, compared to their season average (Hall-72.1, Mafe 70.1). As a result, the Seahawks got no pressure on Stafford. If the Seahawks can get their usual amount of pressure rate against Stafford, they will be fine. In the first Rams game, both Mafe (78.4) and Hall (82.5) played out of their minds--McVay I'm sure took note of that and managed to account for them in the second game. Hopefully Macdonald can counter McVay in this next game.
As a minor note, in the last Rams' game, Tariq Woolen and Coby Bryant both missed parts of the game with injuries, too.