Curiously enough, I'm only a buyer, and the loss of seller ability to leave negative feedback pisses me off -- partly because it means more sellers than ever just don't bother leaving ANY feedback. Why should they? It's a joke.
While I don't miss the possibility of revenge feedback from bad sellers (and just had one rip-off artist who would have done just that), I'm annoyed that eBay pretty much set it up so that buyers can screw up sellers very easily -- mess with the DSR to get it under 4.6, and a seller gets a thirty day suspension; leave negative feedback and once it hits a certain point, suspension.
Selelrs can cover their asses by using tracking -- it comes automatically with UPS and similar shippers, and it's 45 cents at the USPS. Other buyer scams are easily foiled too. Hell, legitimate buyer complaints are easily foiled -- I've been rooked by scam artists using PayPal.
In the short term eBay's apparently boneheaded moves are going to cost them...but if their plan is to become a huge shopping portal instead of an auction site, then making moves to dump all the smaller guys is exactly what they would do. It's entirely possible, however, that they're simply just screwed up.
