I fully support sellers not being able to leave feedback. It was only used retributively against buyers who left them bad feedback.
As far as I'm concerned, once the seller has the customer's money, that's the only feedback the seller needs.
Agreed. As ridiculous as I originally thought the whole idea was, I think it was a smart move. If the buyer pays you for the item, positive feedback. If the buyer doesn't pay you, file a non-paying-bidder dispute. End of story, no?
Remember all the sellers who used to put "I will leave feedback as soon as you do"? Ridiculous.