Damn, nice catch on the Babu Frik conundrum, this idea so far had been pretty non-intrusive with the rest of the film.
At the very least, even if the 3PO dub doesn’t pan out, I still think it’d be a worthy edition to remove Rey’s lines when picking up the dagger and replace the ‘screams’ with sith whispers. Her reactions seem tailor-made to bring attention to these whispers that later become very important.