Most visual novels are definitely written by people who would never pass as authors, especially when it comes to repetition and redundant lines.
So many, including good ones have this mantra of:
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"I thought that it sounded strange"
MC : "Doesn't that sound strange?"
Girl : "You're right, that does indeed sound strange"
"She agreed with me, also saying that she found it strange"
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Another case of redundancy are scenes that could be skipped entirely without losing track of the plot. I can tolerate this with SoL novels, but there is no reason story-focused visual novels should waste people's time. Higurashi is a big culprit of this, while White Album 2 has near-perfect pacing.