The changes to the eBay feedback system have altered slightly from those announced at the beginning of the year and will be implemented from 15th May...
I might feel differently if I was a seller, but I think it may be for the best. Many sellers do not leave feedback until after the buyer has left theirs. I can understand, to some degree, why (when I check negatives there are a few that make me think "did you not read the description?") but feel that if they have sent out goods that match their description in a timely manner, then why not just leave feedback immediately?