I read LOTR (well, listened to the audiobook on my long daily commute many years ago) and the prose was PONDEROUS A.F.! I compared it with the original written version and I was astonished to see that Tolkien spent like a page and a half describing the bark on the side of a freakin’ tree! It was a seminal work that inspired a century of other projects of the fantasy genre, but I really wish it wasn’t written like a Shakespeare tragedy.
Conversely, the Hobbit was written as a child’s story, with tons of rhyming and alliteration (with the Dwarf names, for example). It was almost condescending and insulting to an adult’s intelligence and I very much applaud Jackson for building a beautiful world out of an otherwise manifold-lacking story. IMO, of course.
Never read the Simarillion (sp?), so I can’t speak to its quality. It sounds like several different elements in The Ring of Power were being drawn from that.