That's a fair assessment. I do think it's a little too early to call it a must win though.
The Bills will be 2-2 and be behind the eight ball for the division. However, 2-2 still puts them firmly in play for a wild card spot.
I'm really thinking this is a game where RPOs should really be utilized. The Dolphins can be run on and Allen or Cook in RPOs can probably rip off some nice runs. I doubt Miami has prepared much for this either.