Thank you for the review. <3 I think this is the kind of impression I aim for!
I'm actually not afraid of adding New content, it's figuring out which one is Worth Adding that scares me. : P There's a plenty of things already in the demo areas that can't be reached yet as they are unlocked in other places. Ideally, the PC will return to various settlements many times, revealing more layers of the things to do as well as reactions to PC's progress.
However, I grow harsher when it comes to judging the quests structure. Some of the older in-game tasks involve fetching for items, and I start to see them as a bit lazy. But that's a problem for The Future Me - for now, I'm all about adding NPCs to new areas.