Lamb will be just as impactful as Cobb was last year, maybe more. Diggs is the one who could make the biggest difference though. If he can get some interceptions, blanket receivers, cause a few fumbles, etc., he will be the one that has the most impact on the team. I think the defensive line options that are there will result in a lot more sacks and hurried throws this year so the secondary will have a leg up in coverage because of that. That usually means more turnovers.