I too noticed this "conflict" when VMax1700 made his monthly post. However, our cruise cannot be changed. Booked it last October after coordinating schedules with DD and DS - it was the only one that met everyone's wants/needs. If the cruise does go, I'll report back how much the group size interfered with our enjoyment of the cruise. Our focus will be on the Alaskan scenery rather than onboard activities. DD and DS rented a cabana, we and DS have balconies.
Having lived many years near the Gaithers' hometown, we don't anticipate a problem with their focus. In fact, DD was in a church choir that used his cantata arrangements.