I'd say, broken Kate would be nice to have more content about... I cried a bit when I saw her like that.
But a Moments tracker would be nice to have, but how to make it work as an in-universe thing...? Will you be given a link an app by Unknown, perhaps? Or would that be part of the contacts app?
Edit:
A random name list when creating doing a new game would be nice.
Have a list of 50 common Anglo-sphere/phone names, and select one when not inputting a name.