iirc it was a function in HnH1 that you could see when the person was last seen. idr if it was just a log in thing or physically seeing them but it was a function that greatly helped order my friends list.
i feel that a function like that would assist in weeding out inactive players from the list; another function to add might be a search menu or something, maybe a 'favorite' tag that throws them to the top (yes i know the colors can be sorted) perhaps have the 'last online' replace status (since it just does alpha order) and it sort by the most recently active players