I just don't think the Bills will change their identity with Allen at the helm. This run heavy game plan seems unlikely imho. It's not who the Bills are not is it the strength of the team. The Viking weakness is their passing defense. Allen should be able to exploit the Vikings pass defense. I can see a game plan that calls for slightly more running but nothing dramatic. Enough to keep the Viking defense honest. It's week 10 and this game is shaping up to be quite important. Now, isn't the time for a major offensive overhaul.
Duke may give the team a spark. Hines might be more involved as well as Shakir. I'm thinking the Bills go back to shorter, quicker passes, and taking the underneath throws the defense gives them. Then take some shots downfield. Similar to what they did earlier in the season which was very effective. The last couple of games it seemed as though Allen was trying to force the ball downfield a little too much.
Just my two cents.