I think the secondary will be ok. That is, I think we need a CB2 and ideally a rangy free safety regardless of what scheme we used. But I think Gonzo, Marcus Jones, Dugger and Peppers can all thrive in the new scheme.
With the front 7, I completely agree with you. Godchaux, Wise, Tavai, Bentley and Jennings don’t really fit. I don’t think they’ll move away from all of them in one offseason, it might be too much at once. For example, Bentley is very well respected as a leader and plays very hard each play even if he’s not the most athletic guy. But Wise is a free agent and already on the decline so he’s easy to let go, Tavai is persona non grata in general and an inferior version of Bentley specifically, and Godchaux’s best skill set will be completely unused. I can see that group jettisoned.