how will ethics help with it?1. Reinforcing the RP in your head. And yes, that is important. The whole "you can just RP x y z" is often valid, but it's better when the game rules acknowledge your RP. Otherwise, why are you even playing a game with rules?
you want restrict your war like pacifists? - change your policy
you wanna save those xenos like xenophile or kill them like xenophobe? - change purge policy or embrace Bio ascension and mod them
you wanna hate robots? - well ...you already do I guess
and i'm not opposed to customization of hiveminds. but not through ethics that will not even fit. we already have an instrument for this(civics) and a working example of adding different flavor(machine empire's servitor\exterminator\assimilators)
this is a better idea. and that's the main reason I love more personalities mod, cuz it adds fun to the game.2. Provide AI hive minds and MEs a sensible way to have different personalities beyond the big civics, which would be cool. (I know some civics do change the "empire type" of MEs but I dunno whether their AI personalities are affected.)
but let's be real.... chances that they'll do\add it for free are low. so maybe in a different update after some kind of rework of personalities