Since Liberating planets from an empire creates a new empire with your ethics will Liberating as a Hive Mind Empire create a new Hive Mind empire that will have all non-HM pops, thus eventually dieing out because it might not have the gene-modding tech necessary to turn its pops into Hive Mind pops?
Wiz said in stream, hive minds can't indoctinate or liberate, they arn't able to be liberated either. So in war against a hive mind you need station a pop there cause all the pops on the planet you capture would die.