Before kyousuke joined, TeSeS had a playoff rating of 1.13, which is not only better than NiKo's 1.10, but 6th in the world among players with more than 20 maps against top opposition. After being forced to play in anchor positions, it has dropped to a 0.88.
Recently, he had a pretty good showing at Rotterdam, and it came directly after an interview where he said he was done being a sacrifical lamb. I think TeSeS is probably being wasted on anchor roles.