It is strange that once you were told to blend the ads with contents and that was considered as good policy. Now you have to contrast the ads with the contents?
That's really nice. They want us to keep revising and working on our sites, as they are working on theirs.
You can blend but you "can not hide" . I guess I will transfer all to default google pallette. I guess the cost per click will increase after making the adse different. Than the clicks will more often lead to conversion.
That one is of March 2008 if I am not wrong. Look at the related article. If you are using blend one after than till today than I do not think that you will have to worry about that. So keep it as you were doing.