These didn't all start with patch 1.71, they are just still occurring. Not sure which DLC caused them, as they all started after I download all available DLC:
- No colonization events for "normal" planets after around the 34th planet
- No longer able to take over planets or starbases via culture flipping. Have planets that are completely sorrounded by my culture, but they won't flip
- Starbases not auto-upgrading mining improvements when there is a constructor in the starbase
- Can't rename planets when colonizing them, have to do it from govern screen. It lets me enter a name and select OK, but it just reverts back to the default
I'm playing on an insane size randomly generated spiral map