eph, you have some nice english words in that paragraph. Something I never took much notice of was the potential alien sound of your own voice being stacked. I know michael jackson used to do it a lot, but I think the second voice was often heavily weighted and filtered to take that spotlight away.
On a second note Im interested what you mean by voice leading, are you saying the harmonies are not tight with each other in place or it could do with some more interesting polyphony type harmonies to create more interest?
Cian