Saying that Group B is not a group of death just because they have 1 weak team and no Koreans is a poor statement. First off, the Korean teams dont look as strong as the Chinese teams going into worlds this year. So dodging the Koreans is seemingly less scary as dodging the Chinese teams as Group A has done heralding them as the group of life.
Now while Group D does have its potential to being called a Group of Death; its less so because there is 1 top strong team in that group and then 3 mid-low strength teams fighting for 2nd. All 3 of those teams KT, OG, TSM were not on many people's top 8 lists; close together and near the top 8 perhaps but few would put all 3 in the top 8.
Meanwhile in Group B you have 3 strong teams fighting for 2 positions. FNC, ahq, and IG were on a lot of peoples top 8 lists together. So no matter what, we are going to say goodbye to one of most peoples tournament's top 8 teams in that group. Add in that the group does contain C9 while many consider the weakest team and not likely to advance they do have the potential to take games off any of the other teams in best of 1's. And that is while it is heralded as a group of death.