I agree with all the points made. Yes it is good that Ebay is doing this and they will probably save thousands of $ in wasted time and calls with disputes over this. Alot of sellers are not Sears nor Amazon and don't have thousands of $ in items to replace and item with, nor $ to do so.
Regardless this is another way for Ebay to protect the buyer. This is great when I buy my cards on there. Makes selling smaller items difficult.
Ebay, Paypal, and the PO have a good thing going here. Sounds like a CONSPIRACY