Will Herring will take over Hill's snaps. Herring is not Hill's equal as a run defender, open field tackler, or blitzer, but...Herring is a much better pass defender.
Seattle faces five teams between now and the time Hill is expected to return. San Francisco is a traditional offense, beyond traditional, outdated, but Indianapolis and Arizona are pass-first. Chicago is a vertical-style and Jacksonville is a grind `em out, rush-first offense. Herring could be a better matchup against Arizona and Indianapolis.
[I]f Herring is a superior pass defender, it also could be a net improvement to Seattle's defense.