One of the major complaints going around is how it is that if the player character does NOT rush to help defend a settlement, it gets trashed in his absence. Him/her and ONLY him/her can avert the trashing. So I'm thinking that at the heart of the issue is how Security is handled at settlements while the Sole Survivor is off adventuring. What if unused Companions (who are stationed at stated settlements anyway) were designated Head of Security for the settlement for which they are stationed? Having a HoS would make that settlement immune to assaults while the SS is absent. After all, what all the attackers have in common is they believe that they can succeed, something they fear is not as likely if the SS is present. But if there is a HoS present, attending to the Security of the settlement as their primary function, wouldn't that be motivation to the attackers to take their assault elsewhere?
Also, a HoS would quash all of those ridiculous, "We're being bothered by ________" or "My friend has been kidnapped!" quests. It would free up the player to actually play the game, ALL of the game, rather than spending all his time being the settlement system fireman.