I'm always intrigued by the concept of objectively good prose. There must be something to it or there wouldn't be as much consensus as there is, but it does seem an incredibly nebulous thing. I feel like the most you can say is we can objectively assess whether something fits into the most commonly given standard of good prose - but even the idea of what the most commonly given standard will be subjective. As for whether that standard originates from people we should be listened to? I'm reminded to a certain extent of A Reader's Manifesto by Myers. Some of the examples he gives of hyped prose that's actually drivel I quite like. Some though, I think, are indeed drivel.
Take the statement "great prose stylist". We've been told the highest use of prose is style. Why don't we talk about "great prose communicator"? To me this ties into what vanye said. Style is something you analyse. What's the word for making us feel things? Communicator? Manipulator?
I look at this first definition I grabbed off of t'internet:
"A "great prose stylist" writes sentences, paragraphs, chapters, and/or books using impeccable grammar, an enormous vocabulary, and fresh, judiciously chosen figures of speech (similes, metaphors, etc.)"
I feel like the last one is what a lot of people think about when they talk about great prose. Whether they're innovative, to pick a word from Toby's post. But whether a writer is innovative or not often has little to do with whether we get that feeling of connection.
For me, great prose means a few things. One of them is indeed lines and descriptions that catch my eye and make me go "ooh". But beyond that - clarity and the ability to have me so lost in the flow of their voice, I turn page after page without really thinking about it. And that often doesn't really go with the sort of writing that's trying to fit highly innovative and lyrical descriptions in all over the place.
A lot of what's held up as objectively good prose by classic literature standards just doesn't do that for me. Subjectively, I don't think I can agree about what the objectively good standard should be if that's the standard. To me, it's like how some people think good cooking is something that looks amazing and makes people think "isn't this clever" - and some people think good cooking is what has people finishing their plates and asking for seconds. I don't want to dismiss the qualities of the former, but damned if I think it should it claim good all for itself and be permitted to judge everything by its own standards.
Also, given I'm in a conversation on best Epic Fantasy prose stylist where the newest author is Rothfuss, I'm not sure I believe people here are sufficiently up to date as to be casting judgements on how Epic Fantasy is currently defined, nevermind the whole fantasy genre.
I would have blinked an eye if I'd noticed, certainly regarding the Earthsea books. Two of them do range over the known world, and they contain gods and dragons and stuff, but they nonetheless feel quite small in scale. They each contain only a couple of viewpoint characters, and the things those characters do or are involved in don't have big obvious effects on large numbers of people (as wars or migrations, for example, would have).
I guess my idea of "epic" might come from old movies -- "A cast of thousands!" etc.
Well this here is a bone of contention. I had a similar conversation the other day with someone on Villoso's Bitch Queen series and whether that counted as Epic. And the truth is, I don't think anyone really knows. I think people as a whole simply slap the Epic Fantasy label on everything that moves which features a pre-Napoleonic setting unless it is so overwhelmingly not the case as to be ridiculous to do so. Take Sam Hawke's Poison War Duology. It's mostly about the fate of one city with two PoVs (iirc, I've only read the second and not the first). We don't see the world, save the world, any of that. I think it is legit to question whether it's Epic Fantasy - but that's what everything calls it.
It's a very debased and meaningless term these days outside of very broad strokes, sadly.