What, or who rather are you defending - their racial portrayal is off and comes off as cheap.
You are thinking of Tolkien’s work like Warcraft lore - thinking the exception proves a general rule, rather than catching the insight the examples give.
And Feanor should not be on that list too.
RoO elves are nothing remarkable they lack the distinctiveness and high attributes the very meaning of the word and Tolkien’s attributes underlie.
The stuff these guys wrote just doesn’t hold up to the original and their race and character portrayls come off cheap, laden with political and ideological messaging and all round badly written.
It’s fine for a run of the mill fantasy. Most aren’t anything to write home about and are full of allegory reflecting author’s view that have little remarkable though I do enjoy them for the fantasy they paint. But im under no such illusions their works are literary masterpieces