Arg, I left writing this till too late in the day, so bullet points it is:
Started getting the first assets from the new artist and they're amazing!
The lighting/post processing isn't great yet, but it's getting there
Added ancient rubbish heaps that can be scavenged for resources and knowledge.
Lots of planning for the long-term playability of the game. Stuff like multi-planet campaigns, player edited planets, item trading and so on.
Added a simple leaderboard
Started adding Research to unlock new buildings, then had a big discussion and wound up deciding to change how I was doing it. This is taking a while, but it's a great big feature, so that makes sense.