Let's get straight what is being discussed. The traits that Darwin and the quote you do not like are those that are novel and seeking to be fixed. The idea is that to be subject to preservation(fixed in the genome) you must not be harmful to the organism. Now are you positing a new and improved evolution where nothing(traitwise) is extinguished only preserved to different degrees(danger where are all of the intermediates)?
Oops. The traits that Darwin is discussing in the quote...