Hello, if you're having issues with the game, it's likely because the extraction isn't properly converting the file names to Japanese and instead the names are coming out grabled.
For Linux you can do:
unzip -O shift-jis <zipFileName>
In WinRAR:
You have to go to Options->Name...
I'm not saying they weren't really good. I'm simply saying they're STILL releasing them, which is strange since shockwave and flash aren't supported anymore, so getting those games to work can be a pain, especially if you're using WINE.
If the story is good, then there is no need for VO work.
I find VO is more likely in these circles (or even in AAA games) to detract from the experience than it is to enhance it.
I think that the cost of actually "Good VO" is just too high.