But are you finding that pops are not swapping? As in the 'fix' didn't work? I know you still get a somewhat random allocation of ethics to your starting pops.
I haven't tested the second run yet, and afterwards I'll do two more runs using Conformists to see if +30% is going to make a difference.
But as others have pointed out, suppressing factions seems to do nothing at all (in fact, I can confirm that my suppressed Spiritualist faction as a Fan Materialist empire grew faster than my secondary Military faction (though I didn't have many wars, fair enough) and MUCH faster than my unsuppressed minor Authoritarian one)