Not only is it irritating as nowhere is it stated that the friends list actually has a cap, but having to constantly trim people (who then ask "why did you unfriend me?") often to add again the next evening is incredibly frustrating.
Honestly for a game revolving around communication and teamwork the rudimentary social system needs to function a lot better. I can put up with all the flaws, but impediments to grouping fall IMHO under "matchmaking issues" and thus are a high priority for many players.
Edited by DodgerH2O, 17 January 2013 - 06:39 PM.