Removing the Bureau of Labor from the game should be as easy as deleting the entry for it in ImprovementDefs.XML.
As far as changing Coercive to something else goes, I believe that you'll want to find the PatrioticAbility entry in AbilityDefs.XML, and then change the EffectType from PatrioticAbility to something else (an EffectType of Diplomacy will get you a relations bonus of the same kind as the Likable trait, with the Value line being the magnitude of the bonus; DiplomacySharedBordersWeight with a value of -1 will remove the relations penalty for shared borders, though if combined with the trait in the Malevolent tree it might result in a positive relations modifier for shared borders; there may be some other diplomatic modifiers you can find).
