Just so the poor beleaguered Durin doesn't have to say it, I'm sure it would NOT be a simple matter of copying the code from the old version to the new. From AA5.5, Audition was completely re-written from the ground up to provide for compatibility with the Mac OS and this meant that everything included had to be created anew.
However, I can tell you that, from experience, when Durin says he'll add your comments to the list, he really does mean it. As I understand it, the number of requests for a feature really do influence the priorities there.