Hells no. I may have expressed myself poorly but what I'm actually suggesting here is nothing of the like. I meant to propose simply injecting content throughout the gameworld, comparable to the amount of content that would be present in a classic expansion but no longer localized to a single location. So integration rather than separation. Did that make more sense?
I know exactly what you mean. Cause in the past DLC, once i finshed it I had pretty much no reason to go back when I was done with the quests, but I dont think a huge change to the game phyically will work(new towns, buildings, terrain). Is why Bethesda had to tack it on in a remote locations in the game, but what i'm sure thay can do is add new locations like: abandoned houses that was there just for looks, will now able you to go inside, new accsesable man-holes, new quest from already met characters and newly placed NPC, more dailogue, new radio staions, perks, weapons, and with random NPC wondering the wasteland with active quest.
Now I know some may want a diffrent location a new look and feel. But they can still do this, just make it somewhere you would have or want to return to. Like quests that would take you to the wasteland and back. vise-versa.