Yeah that would be a success. But I also don't believe the secondary has cost the team many games, and if so, certainly not as many as an offense that hasn't been able to score points consistently.
2022 will be all about scheme changes, because they certainly don't have as much talent on the OL. They lost a high 2nd round talent in Daniels and a future HOF LT in Peters. They replaced them with a 5th round pick, who struggled at the end of last year and likely a 6th or 7th round rookie.
One starting safety last year was worst in the league in pass D. I have hopes our rookie safety will improve that quite a bit. We also were terrible at CB opposite JJ so between the two DBs we drafted in the 2nd I think it's a reasonable hope/expectation that we improve a good deal in the def backfield, even with rookies who will have their growing pains.
I think your references to the OL are very misleading though.
They lost Daniels who graded out well below average as an OL last year. The fact that he was taken high in the 2nd means nothing at all. They didn't suffer a greater loss because of where he was picked.
They lost a HOF LT. Was he playing at HOF level, or just pretty decent? He was a good pickup and he did as well as we could have hoped, but we didn't lose Anthony Munoz in his prime. We may experience a step backward but it won't automatically be a great one, if it's even a step backward at all.