Of course it's debatable whether Köln going through at home against Kiel qualifies as a proper upset, yet the 3-0 result is surprising, given Köln are the team playing 1 tier below the other.
Also feel for the public broadcasters: Since Dortmund are out, they have to show a match neither involving them nor Bayern next round, they will have to evaluate the matches, instead of doing what they always do.