The hops are only meant for balance. They should not be forward whatsoever. The vanilla notes we had in ours came from aging.
Subd, this looks interesting with the Special B and sounds good if there's really as much vanilla as it sounds without actually using any vanilla.
One thing I'm wondering with the grain bill is where does the roastyness come from? None of those malts are known for providing that, except maybe the chocolate but there not much in comparison to the total amount of grain.