I finally got a chance to play A20, and damn there was a lot of work put into this. The new city prefabs look like actual city architecture, and everything fits together nicely. Clearing an entire town solo used to be easy, but I'll probably never be able to do that again with the size and complexity they offer now, which is cool.
With how much content the game has, I think the trader missions could have a lot more variety, like destroying a radio tower, repairing a structure, refueling some generators, planting some food, or building and installing some turrets at the trader post. Maybe there could be some items which could only be obtained through trader missions.
The one trope I'm not thrilled with are all of the surprise attacks behind every closet door, or trying to avoid the trigger which causes everything to wake up and fall from the ceiling at once, or other beginner traps. I would like to come across a regular building that seems empty, but is home to just one very nasty creature- so nasty that you would consider coming back later, or maybe using your construction skills to cordon off its paths with blocks and bars to give you an actual chance at killing it. Difficulty shouldn't be confined to turning every POI into a labyrinth.