I've lost my positions on several important key phrases. I've gone from #1 to #3 on some, and from #5 or so to #9 or #10.
If the sites that took my place had more of what everyone has assumed Google wants---traffic, inbound links, authority, etc--I could figure out how to regain my rankings.
The sites that have overtaken mine, though, have less traffic, far fewer links, and are less relevant to the keyword phrases. Some are only tangentially relevant.
With that being the case, how is one supposed to regain rankings? Obviously more links won't do the trick, as my site already has more links. Traffic? I already have it. Relevancy? It's already there.
The rules have somehow changed, but how do you compete when you don't know the rules?
In the past, when Google had an update that adversely affected my rankings, I'd just sit it out. This update, or whatever you call it, is lasting much longer, too long to just sit and wait.