Well if VLC supported MKV ordered chapters it would somewhat support what you are suggesting (and more). However it would however only work with MKV files and you would have to remux your files in MKV (no need for reencoding for most media files).
I totally agree with palettentreter. I know a lot of people who use VLC for all their multimedia playback needs, and most of them always put the volume slider above 100%... and get horrible distortion without knowing why. Eventually they get used to it but of course when you show that to them they u...