Hi there, I know that I can't help but just wanted to let you know that we are in a similar situation. We have an e-commerce site (so slightly different) but we have no dodgy back links, have been as clean as possible and each and every description we write is original. We have a lot of content and none of it is duplicated anywhere on web.
On Sep 23 we dropped from #1 or #2 down to page 2. Yet in our place are some sites with copied content. The top 2 spots seem to have gone to newer sites which do have original descriptions which has me wondering if we should be changing our product descriptions on a regular basis (any ideas?)
One last note if this is also about customer behaviour we have pretty good interaction, a lowish bounce rate and good engagement for a retail site.
So like you I am at a loss to see why we have been penalised by an change which is supposed to help small sites with original content and good engagement!
