It's only 3% chance each action, but with questing now every 2 hours * total number of worker slots... that's a lot of chances per day to drift. I suppose I should mention that most of the drift you're seeing is aliens deciding they want longer breaks between quests.

There are buildings on our list that reduce the chance of drift on each action. Frontend is working on alien names and colors and backend is working on guilds, which will have new buildings (but not that one).

After guilds we will see about a focused building pack for anything on our list that doesn't require a full module, but we wanted to get guilds out first because it completely changes the early gameplay strategies and makes that initial ramp a lot more fun.