About the only time D&W did a Senior B was 2009 when they competed at (and won) Nebelhorn, preparatory to the Olympics.
One thing I can't see S&Z doing is having D&W and V&M at the same Senior B. I'm surprised that the Shibs are going.
Since Skate America is the first GP this year on Oct 21-23, D&W will be getting input almost as early on without the hassle & expense of travelling to Europe and disruption of their college curriculum. Their second GP is CoR, which this year is the last GP on Nov 25-27, so they have time to adjust things that need adjusting accordingly.