People have made due with conceptual fuzziness, I think it's disingenuous to suggest that discussion is impossible without absolute conceptual clarity. All you are saying is that using these terms does not allow you to have a specific kind of discussion - which, a lot of the time, is one that reduces humans to mathematical objects that perform computations.
Yet, if that is your goal and the definition of "soul" or "consciousness" are entirely arbitrary decisions that you don't care about - then it's worth remembering the adage "you may not care about politics, but politics cares about you".
> People have made due with conceptual fuzziness
Yes, but as noted elsewhere in this thread it's a matter of degree. Consciousness is such an ill-defined and overloaded word that it's hard to say it really means anything - it's more of an all-encompassing term for a bunch of largely subjective phenomena.