If you haven't heard, eBay is taking away "negative" feedback for buyers. In adopting the new rule, eBay stated they want to protect buyers from retaliatory feedback from sellers.
All in, I support the change. A few years ago, I had a problem with a seller who's posting was misleading with respect to how he took PayPal. I wanted to give him a negative feedback; however, I gave him a neutral review. Of course, he retaliated with a neutral. This guy sells 100's of items per month. If I give him a negative rating, his overall rating will go down by less than 1 percent. If he retaliates, my rating goes down by almost 5 percent.
Since seller feedback is incredibly important, eBay was right to give people the opportunity to comment on sellar behavior without fear of retaliation.