Your suggestions for a better feedback system are fascinating and could bring major improvements but we may as well discuss how many angels fit on a pinhead. Ebay aren't bothered. They're actually degrading their system to make it less transparent - witness the introduction of Hidden Bidder ID.
Try visiting that useful feedback aggregator mentioned above: http://www.inetfeedback.com/ebay. The eBay developer is now forced to announce: "Sorry - eBay has requested that this site be shut down because it violates their feedback policy."