As I have previously stated in the discussion, I think eBay messed this one up. The problem was sellers holding buyers to ransom. Now the opposite is true.

Since the buyer's duty is essentially complete at the moment of payment, the better way to solve the issue of buyers being afraid of retaliatory feedback would be to activate buyers leaving feedback only once they have received feedback first. That way, the buyer - once their end of the transaction is completed - is credited with fulfilling their obligation, and the seller has to come through, since their obligation is to deliver the goods.

Yes, there will always be moron buyers who are impatient or who don't read the description properly, but if you check a seller's feedback, you can usually spot them.