Oh advice on music, yikes you sure you wanna ask me...?
Ok, i think the whole song is a bit subdued, but in a really good way. Its like its trying to bust out of its self, slowly growing with only the instruments it has until it cant go any further and collapses, then comes the outro. The song seems just short of being too repetitive and i think to add another instrument would take a lot of adjusting to the over all tone of the latter bit of the song. I'm no export and probably not the best imagination plus its 5 am here but i always know what i like when i hear it.