They added Curtis Samuel and lost Gabe. No loss
Corner they lost Tre, who really hadn't contributed in the last 2 seasons, and they got Douglas last year, who was a major upgrade.
The only position I will agree with you on safety, but Poyer and Hyde were gonzo regardless. There's STILL THE DRAFT.
They haven't replaced Diggs yet, so what's the point of complaining about it? They can't be any worse without him than they were the 2nd half of last season, when they basically won without him anyways.