There are four/five(?) things I've been chomping at the bit for since I ran across the characters/devices that could make it happen:
1) A Mobile Pharmacy / limited Salon in your bathroom thanks to the mirror and cabinet, it's been sitting there without a purpose (as far as I know) for a really long time now and it could serve as another vector to the Ardia issue I brought up where according to the Codex, there are already anti-addiction Dzaan medication available, as long as she regularly takes them the narcotic effect of her cum wouldn't affect others.
2) Briha and Lys signing up for the crew (plus a really cool quest to get them out of Myrellion and seeing eye to eye with each other) I remember seeing some plans somewhere about this and how they'd react to each other on the ship, so I've been waiting to see if there was any further word on it.
3) Nova interfacing with the hardlight upgrade, armours, weapons, and underwear to grant herself a higher shield bonus (and damage bonus when it collapses in combat) on top a new customization option. Mainly I kinda wish she could integrate the hardlight underwear so that I don't need to remove the hardlight underwear to swim. Given that this would definitely be a power drain on our gray goo armour, perhaps it start with her basically wrecking a hardlight suit to get at the "good stuff" inside it, only to realize that whoops, she destroyed something pricey, so she integrates the components into her and she finds a new way to do things, but she needs more samples of other hardlight stuff to fully realize her full hardlight capabilities.
4) Crew Members who can explore an area with you, it doesn't need to be everyone for every planet (some might not wish to explore a specific world) and there can be a slots you can put crew members in to create a party.