I disagree with the first part (that this is merely a voice). There is a distinct difference between an author's unique voice and slop. It may be hard to tease out exactly what the difference is, but it seems self-evident to me it's there. (I'll need to think more how to make the distinction explicit; it's not immediately obvious to me how to discriminate between the two.)

EDIT: ok, here are two ways:

1. if it's merely a voice, I want to hear it. If it's slop, I want it taken out.

2. voice is signal, slop is noise; thus low-signal sentences are slop.