Is there a defacto means for communicating these kinds of requests? And if not, I think a request for a feature like Dropbox's Votebox is in order -- https://www.dropbox.com/votebox.

We don't have a formalized suggestion mechanism. You can email them to me (jbarr@amazon.com), post them in the AWS Forums, write your own blog post, or you can come work at Amazon (http://aws.amazon.com/jobs) and implement it yourself!