Plan for DW3 being the biggest DW ever:
Fleet Carriers mean that not everyone needs to keep to a schedule and constantly put in a lot of hours to keep up with the expedition; you can park your ship in an expedition Fleet Carrier and automatically be along for the ride even knowing you'll have no time to play that week. This makes DW3 far far more accessible to far more people. Once word spreads that eg. 30 minutes a week is enough to be part of it, a lot of people are going to take part that would never be able to consider a DW before.
This larger fleet involving more players with less time is a "demographics" difference from previous DW that should probably be taken into account when figuring out the nature of DW3
As long as they remember to still carry a fuel scoop just in case the carrier they are on jumps while they are not docked!
Still, should be easy enough to find a new one with how many will be going along i imagine.