Buffalo's defensive rebuild under new addition Dee Alford has faced scrutiny after a Week 4 home loss to New England, highlighting how the Bills’ defense is still developing chemistry amid a hostile Highmark Stadium environment. Alford, who replaced former starter Taron Johnson, contends that crowd noise complicates pre-snap communication, while acknowledging that the unit must improve. The loss featured Drake Maye throwing for 269 yards and three touchdowns as Buffalo yielded a season-high 29 points, underscoring the ongoing challenge of building cohesion in a new secondary. The coming weeks are framed as a period of continued adaptation and targeted practice to mitigate home-field disruption and elevate communication. Momentum hinges on growth within the defensive backfield and stronger on-field execution at speed across the unit.