To me (and most likely everyone else), the three biggest concerns are (1) interior defensive line depth, (2) down the field stretch receiver, and (3) corner.
While the interior line may be somewhat weak, it's also backed up by a very strong group of linebackers as well as Bosa off the end. And while we may be missing a stretch the defense receiver, I think there are plenty of weapons especially if JT wins the job and he can dominate the intermediate routes and Jalin, Dontre, et al can stretch the field horizontally or Braxton wins and he can do the same but also with his running.
But, when Apple went out for a few plays last year, watching Conley get abused was not fun at all. That really concerned me. Now, players develop and so Conley will be an improved player (or Webb or Lattimore of whomever). But for that reason, I would bring back Gamble.
Also, as a bonus he could return kicks and remove a lot of my anxiety during the games.