Mod your game.
Screw up your code beyond recognition and then download it again.
I did, and it was fun.
Personally, I’m waiting for the improvement of NPCs.
The idea of having a fortified NPC fortress sticking out as a rebellion in my wasteland kingdom is pretty exciting to me.
Another possibility is that the devs could further complicate the follower dynamic, making relationships with NPCs more interesting in general.
Realistically, if you want to leave your game intact and you don’t want to wait for improvements, strange temples, mines, and triffid groves present at least a moderate challenge to anyone. If you haven’t done all of those three, I strongly suggest that you do.
One cool idea that I’ve thought about is setting a goal for getting to a specific point on the map (for myself) to reach as the final goal of the game. Before you load up a new world, write down some ridiculously distant coordinates on a piece of paper and focus on getting to that point. Hopefully your load times don’t eclipse your play time, though…