The Ravens are currently pretty sickening to watch. I have to think it's time to take stock as you said and see what is needed to turn the team around.
In my estimation, they need a new LT (I think Stanley is gone), RT(Rosengarten is mediocre at best), LG, RG, and, if Linderbaum leaves, a new C. They don't need any additional skill players at this point.
On defense, I'd say they need 2 pass rushers, and I don't mean injured guys trying to make a comeback or old retreads. And I don't mean guys having a great year from lower rated colleges.
I think it's impossible to do all this in one off-season. They need at least 2. Interestingly, that's the time Lamar's contract will end unless he renegotiates. Take that for what it's worth, but it could very well mean we need a new franchise QB in 2028. Preferably, a pocket passer who's mobile and not a mobile passer who needs training as a pocket passer.
So that's pretty much a major teardown and rebuild.
Oh, and let's not forget, we need a new coaching staff.
What we fans will need: some patience. This won't result in a sudden, major turnaround.