Poetry is not a silent art. The poem must perform, unaided, in its reader's head. Educated readers give themselves a good performance. Educated listeners compare performance with text and with other performances. Good poets use the full resources of language.
Poetry cannot be defined, only experienced
It seems to me that the contrast between adjacent syllables has lessened and the result is an over-reliance on enjambment. Now enjambment is a fine, intellectually strong aid, but like all such things it becomes tiresome and calls too much attention to itself.