What Does Everyone Want EP7 To Be?

Tropical. Not only it's finally an opportunity for mermaids (and come on if they don't include them on the pack...!), it's also most likely going to offer things that can't be achieved through mods like underwater swimming/diving, as opposed to Uni interactions which aren't that unique as far as gameplay features go.
That and Uni is also mostly for YAs instead of all lifestages like tropical vacations.