Oh, hello.
Is this constructive criticism? If so, I thank you.
1) "Startling naturalism" in Donne you would understand clearly by reading, for example, 'The Good-Morrow' or 'The Canonization' -- that is, the abrupt and colloqiual syntax and diction, the explicit and tactile subject matter (love, sex, death), which was startling in the context and against the norms of his time. Later, less so.
2) "are My Lord Ignorant or Sir Voluptuous Beast really 'riotous sobriquets'?" Yes, they are. They are rather boisterous, funny, slightly out-of-order insults aimed at real individuals.
3) "the assumed authority" comes from the First Class degree and MA in literature, the singular cheek is that I apply it to everything else I choose to write about. But as you always say, every act of writing in public is part-performance. You raise the stakes for yourself if you take this tone, which can only be a good thing, either because you will succeed and therefore improve, or because you will publicly fail and deserve to. The trick is to not be afraid. There is nothing worse than timid writing.
4) Read yer Foucault, as someone once said to someone else.