I have seen many suggestions , and they are all more or less good . But no one suggested this so far: FREE ZONES!

What is free zone? Its unique feature in game.A zone once cleared of the enemys stay that way,but not just that . That zones could be around certain key points in game like diamond City or GoodN. And you can choose patrols and guards in that zones! ofcours it will cost you money,and mybe some new perk for that? I really dont like enemys respawn , it breaks my immersion to the game.So i miss that feeling of accomplishment that i cleared some area from the mutants/raiders etc.. Of cours ,this is just basic idea , if devs likes it ,they can advance on it

Wht do you guys think?

I like it maby assign settlers to cleared areas and have build mode only for cleaning up the cleared area not to build anything.

It would conflict with the radient quest system. Furthermore, logically speaking, new inhabitants (likely hostile) would eventually move into the location. Admittedly, I could see patols for some locations, though.