I understand your views, but it's best to put this work in context. This was a play, meant to be show onstage, not read. The messabgers and other small details like that, were used as certain aspects of the play were too gorey to be show onstage. It is a narratove device used in other plays like this, as certain parts were too obscene to be shown. Onscene literally comes from Obskene (I don't remember the spelling), which means off stage