Great review there, Hemisent!
I´ve seen pretty much negative feedback about the GWX´s positive bouyancy compared to the NYGM´s negative. AFAIK, DTB himself said once that the uboats bouyance was always trimmed to be slightly positive, but they couldnt model it at that moment.
Anyways, I hope to see WaW 'even out' again after the NYGM only days.