We do read pretty much every suggestion that gets thrown out there. We just don't like to give concrete answers because, while we may think something is a cool idea, we may find we don't have time to commit to it in the foreseeable future.
As for tidying up in here, we're not going to do anything immediately, but we are planning to revisit the idea of an Archived Suggestions forum, much like we have in the Bugs Forum where we can put threads and issues we feel have been dealt with. We can't do anything about it right away because nobody on the team really has time to curate it right now, but we'll certainly have a look at adding it once we get our next chunk of content/updates out of the way.