The only real way around this is higher proces on Amz compared to elsewhere with the same Seller, so on Amz say an item is £120, but on the other sites it is £100 still - that way Buyers choose, but a lot of Sellers will need to do the same .
I noticed with clothing that is now the case, so e/b has it £10 and on Amz it is £15 - and Amz are saying clothing not very busy, so if that happens with a lot of items, who knows.
I also gather this policy has been on Amz USA, so any comments from any Sellers that sell there?
Only good thing I can see is less A-Z and less and f/b probably. But encourages Buyers to send back broken items of course and not take any care. So higher rate of returns in general is likely.