If you look at it from the buyer's point of view, the buyer can now be totally honest about the seller without fear of getting their own rating dinged. (since they don't have a real rating anymore).
The only thing I would point out is that this goes against eBay's business model, and advertising slogan that people are honest and trustworthy and you have nothing to worry about when you use eBay. Meaning, there's no need to fear getting your rating dinged; go ahead and be totally honest about the seller; he/she will be totally honest about you, too -- and there should be no worries because both parties are trustworthy. (We all know there are dishonest folks on eBay, but if you assume they're all dishonest
then the whole system falls apart, so let's not pursue that any further.) The system is based on trust. Period. But now eBay is saying, okay some people are dishonest, and by swaying the favor so heavily towards the buyer eBay is implying that the only dishonest people are the sellers, and should be treated with caution.
I've been selling on eBay for about 8 years now and have had my fair share of shifty buyers, but I've never once thought the whole system needs to be "fixed" to protect me from the "evil Buyer". I understand there are a few bad seeds, but by and large the vast majority of the buyers are honest, average people, and I had no qualms about selling on eBay. As a seller, I would hope the buyers would see me the same way and trust my decency.
But eBay is now implying all sellers are out to ding your rating, they're a shady lot -- WATCH OUT! That they're all dishonest. (And now the system will start to fall apart.)
I am now seriously looking for other options for moving the vast majority of my Star Wars items (you'll probably soon see listings on this and many other collecting forums).
Just my two-cents...