That seems a bit odd. I mean im not questioning the software engineering, but it seems to me that "hivemind" govt type is as simple as a penalty to research traded off with a boost to industry and a - in ethics divergence.
*shrug*
If you would be happy with a Hive Mind simply be that.
There is already an AI Personality which is Hivemind, with the appropriate flavour text for Conformists, who are Fanatic Collectivists, without the any Pacifism
Make them a Despotic Hegemony as "This government is a materialistic form of autocracy, where citizens are viewed as little more than cogs in the state machinery. Efficiency and technological progress are valued above all things." seemed most fitting fluff wise and used customer Empire Ruler titles, of Voice of the Hive