I was working on a blog with 200+ authors and quicksearch is a very bad ui decision for me. I was looking through the code and noticed you are contemplating adding pagination.
I was also looking at the code of co-author plus and noticed the beautiful autocomplete UI for adding co-authors. Is it possible for you to discard the pagination idea and the current quicksearch in favor of autocomplete like in co-author plus?
I could help out, if needed.