I can see what ebay are trying to do. They want a more up market 'marketplace' similar to Amazon or Play etc. That I can understand and makes it possibly a better commercial decision for them.
The only thing is the DSR's are in the hands of a majority of idiots with unreasonable expectations. They don't understand overheads, VAT and the pixies who live at the bottom of the garden who pack our orders for free.
I believe in rewarding quality sellers however the DSR's are flawed and therefor not an accurate measure of your performance.
Amazon has been performing great for us month on month. We also have the best two selling products in one of the categories - buy box heaven!. As for more sellers, bring them on, the majority won't be able to compete as they have trouble running a bath let alone a successful business