Sentences are not different enough to hold the attention unless they are dramatic. No ingenuity of varying structure will do. All that can save them is the speaking tone of voice somehow entangled in the words and fastened to the page for the ear of the imagination. That is all that can save poetry from sing-song, all that can save prose from itself.
Trust him to have his bitter politics
Against his unacquaintances the rich
Who sleep in houses of their own, though mortgaged.
Conservatives, they don't know what to save.