I think the VA was no less than usual tbh, in msq. Side-quests are fully unvoiced yeah.
What really struck me though is that Nero doesn't get a single line, and I don't mean a voice line, he doesn't speak at all, he just sits behind Cid in silence, very unlike him. I was told it's probably cause the cutscene was voiced and they didn't have his voice actor, but it's sad.