deleterious effects:
1) not reading other authors;
2) failing to understand what Tolkien was actually doing with Lord of the Rings.
Tolkien would be horrified with anyone who wasn't familiar with Beowulf.
1) I’ve read many other authors. I read at least a dozen, sometimes upwards of two dozen, books a year for the last fifteen years, most in the fantasy genre, though not all. I just never read THESE authors. So that definition doesn’t really apply.
2) it doesn’t matter what an author is “trying” to do with a work. What matters is what the reader takes away. If the author is “trying” to do something with a work, and the reader takes away something different, it’s the author who failed, not the reader. I know. I’m an author.
Therefore, just because readers don’t know what the author was “trying” to do, doesn’t make it a “deleterious effect”, so your second definition doesn’t apply.
As no deleterious effect is present, no problem is present.