My suggenstions to Guild Wars
Allow change primary profession for PvP only characters
Why not? Creating different PvP characters take additional slots and time. Advantages of this solution: less time spend on preparing to PvP, same Nickname and more free slots. If some like to have many PvP characters it's no problem. It will be facilitation for main PvE players.
More info here: 
Make able to group friends in self crated group friend list
Now we have a little mess if we get full friends list. Simple allow to create up to 5 groups and give them names.