HMMM. That is interesting.
When I look at other cruise lines that do a trip
like this they only take about 4 full days to get to Hawaii. (Normally from LAX or that area).
Even if it was 5 days cruise, 3 days ports of call, and 2 days at a resort would work great for a lot of people. Others could do the reverse, and still others could do round trip.
5 cruise 2 ports.
4 cruise 3 ports.
You get the idea.