Proper endings within world lore, logic and providing real closure.
Normal car purchase mini-app (It's 2079 and cyberpunk, and car purchase mechanics is lame and clumsy)
All promised but cut content
Remove the markers from map, let players find them themselves, actually travelling across the world, like in RDR 2.
Ability to solve the problem socially, without violence (add some social implants, like in Deus Ex:HR)
Some activities with romance interests after romance completion (ask for a date, ride in a car, talk, additional sex)