1script - 8:01 pm on Apr 5, 2013 (gmt 0)
I am almost exactly in the same boat (more details here: [webmasterworld.com...] ), and the trajectory is kinda similar to yours: traffic before penalty: X UV/day, during penalty X/10 UV/day. After the penalty has been revoked, X/100 UV/day.
Makes no sense that algo changes do not affect penalized site: it was suggested before that the site gets "frozen" at the time of the penalty. But other similar sites of mine that did not have a penalty did not end up with X/100 (even if traffic did come down on some of them, it's not 100 times down). So, the penalty did play a role, I just can't figure out which.
It's already been 2 months after the penalty has been revoked - no change whatsoever, the traffic is lowest it's ever been - I WANT MY PENALTY BACK!