I do know that sometimes the sellers do need to hear the opinions of other professionals. The selling agent knows better what the buyer wants, and chances of finding the right home improve. The selling agent can initiate a dialog with feedback between the buyer and the seller. The listing agent has a reinforcement from the marketplace that can be used to encourage the seller to either fix the problems or adjust the price accordingly. The seller has the opportunity of making the changes and making the sale.
Feedback provides a second chance, if the seller is willing to take it.
At the very least, feedback is a courtesy. A response is the least a selling agent can do. At the most, feedback can open the dialog to closing the deal. The ball's in your court. We'll work on it.