Sgt_Kickaxe - 6:45 am on Jan 7, 2013 (gmt 0)
I highly doubt it's rss feed related, I cut the feedburner feeds to my site back in early October and saw no gains.
I highly doubt it's scraper related, I ensured that my site can't be hotlinked and I went to town on my logs in late October blocking nearly everyone from specific foreign language countries and who had previously scraped. My "not selected" number of pages listed in GWT now stands at two, down from several thousand. No improvement.
Is it, perhaps, U.S. traffic you have lost primarily? I'm wondering if it's foreign owned sites seeing declines from other countries regardless of where the site is hosted. e.g. if you live in Canada but host in the U.S. your Canadian traffic would slightly improve while your U.S. traffic would fall off a cliff?