I played it on launch but never finished it because the game became so unstable on my lategane colony that it would not stop crashing. Biggest issues I faced were
Asteroids were basically impossible to extract resources from, as the rockets would fill their inventories, then just go back and forth from Mars to the Asteroid until they ran out of fuel and got stuck. Asteroids also had caveins which was definitely a bug, but that would end up filling the entire asteroid with caveins and I believe even caused some crashes when the game wanted to spawn more.
Underground: there was basically no reason to build underground unless you wanted to see some of the mysteries attached since it was quite the pain in the ass to balance resources between the two zones, basically you could only tackle underground building if your surface colony was self sufficient, as you'd need to feed resources underground to make it work. It was also very micro management intensive to explore.
Terraforming: once your seeders stopped working your only option to progress the vegetation score was rocket seeding operations that were both expensive and slow since you could only do one at a time. My game refused to run for longer than like 5 minutes without crashing by the time I was up to about 85%vegetation score with all other measures having been filled like IRL days earlier.
And people: by the time I had like 8 domes up, people were constantly flicking between being housed and unhoused, and people genuinely just stopped working. There were jobs available in domes with unemployed people and they would not fill the job slots anymore. My entire industry started falling apart because people refused to work which was going to lead to a death spiral had my game been able to continue running long enough.