Thanks for the thoughts. Unless I'm missing something, though, that approach wouldn't hyperlink the bullet back to the cited text.
I'm doing this because nonfiction books often forgo the endnote mark entirely and just put the page number as a heading above the endnote (e.g., Malcolm Gladwell does his endnotes this way). So, there are no superscripts in the text, but if you read something and want to see its source, you look it up by page number in the notes.

Rather than removing the numbers entirely, I'm planning on hiding them in the text and changing them to bullets in the endnote table so eBook readers can tap on the bullet to hyperlink to the location in the text.