Although volleyball could be interesting too, my vote is for the sailing trip. Volleyball likely would be something like the two contests in the game, with a number of girls taking part, but that is about it I think. The sailing trip could involve some quest or some remembrance of events past with some photo's maybe.
More potential there I think.
Yes, that is fair to say.
The technical angle runs a bit like this,
Volleyball suffers from being based on replication (that content must be replicated to all girls, either generic renders as in competitions or as in a vast number of combinations ex. outfits * girls * locations = years of work).
Part of the old "dead" 2017 design. So its modern concept would look more like a limited event with a few select girls and some after-game, ex. beach bar drinks (or a limited generic competition).
I say limited because it has the additional problem that it adds no obvious value to the greater game (no links to Island, Lab, Story, Staff, Characters, New girls or Future plans). Even fully implemented is it simply there.
The
boat trip is a developer concept, have known renders, Amy (unique, max tier) and Jennifer (special, Joy's niece) are future design, and Miriam (special, lab ties) has teased other work for Joy and pictures from a yacht (possible combos). That is a lot of high value boxes checked.
Disclaimer
I am not saying technical constraints or real world design should prevent anyone here from wishing. Far from it.
Nor that one thing will happen or the other not.
But a little pixie dust (thinking said boring things into the wishes) usually go a long way to one day see them happen.
(also Mi and Ivyness will be on my team, so I'd suggest bringing sand proof underwear for anyone else planning beach volleyball

)