Voicing in amateur visual novels is a big no-no. It's something that a dev shouldn't even look at. Voicing is something that only big studios like in Japan can even produce something good with actual good voice actors and even so, it's not something that appealing given the target demographic of Visual novels which are people that are prone and enjoy reading, so they tend to read fast making voicing obsolete.
It's a pretty perk to have in a game but it should be last in the list even in "AAA" Visual novel.