I had to go with "other" here.
Yes, the publishers should be able to have creative control of text formatting (including fonts & page breaks, etc) for poetry, chapter titles, inline quotes, etc.
But special formatting should be the exception - not the rule. And our ereaders should be capable & required to apply sane & attractive defaults to the rest.
And the end-user should have the ability to over-ride anything.
But keep in mind that we've *never* had this capability before - the publishers always had complete control - and pbooks sold and were read just fine.