Playing a new game as a hive mind, I noticed that the Molluscoid Miners event is missing some restrictions it probably should have. The top path that grants pops can be triggered by hive minds, as well as other playstyles that probably shouldn't be able to like fanatic purifiers. These should probably just not be able to trigger that path, though it could be interesting to allow them to have them as part of the hive mind since the event seems to be about integrating them into your society (though perhaps only after the tech for integration is researched).