Why, because they're going to shut down Sammy?
As for the team, it was suspected that the defense would struggle without Dareus (his fault, not the team's) for the first few games and because people thought the LB's would suck (they're actually a strength). The secondary sucked against the Jets, but Fitz was in the zone and the Jets have an excellent stable of receivers (that Enuwa is going to terrorize the Bills for years, and I told my son to pick him up in fantasy) and he was just tossing them up or having them fake to go deep and then coming back, which are tough to defend. Wait for Dareus to get back and things improve on defense immensely.
On offense, I'm willing to give Lynn a shot before I declare the season over. And if Sammy is out, the rest of the team needs to up their game.