My friend list is big and I think maybe that some players might not play anymore. I need space for more active friends but I can't keep track of which friend haven't been online for quite some times so I have this idea.
Next to each friend on the friend list, have a "last played" button that allows us to see the latest day that player has been online. That way, if a player haven't played for a year, we can know to remove from friend list to add more actively playing players.
This will be helpful in situations where you want to add a player that is helpful to your full friend list but don't know who to remove and are afraid to remove an actively playing player that still plays.