Is there a tension between the democratizing impulse of the RM and the socio-political relativism of non-imperialist missions?

Given that the RM of the American frontier crystalized into an ecclesiology with culturally defined assumptions--a democratic interpretation of the priesthood of all believers being one of those--foreign mission fields present a challenge to the definition of a universal restoration.  What, then, does restoration consist of in other cultures, where Christianity must take the form of a contextualized ecclesiology?

Doesn't contextualization present a major difficulty for the notion that restoration churches, such as CofCs, can resolve their identity crisis by referring to a historical ecclesiology?