I've noticed there is no "mark all as read" button which on most forums helps me "reset" the threads at a certain point and look for new reply from that point.
One more thing is the summoners avatars. Its somewhere implemented and only staff got avatars but for all the non-staff forum members there's the grey questionmark.
© 2013 Riot Games, Inc. All rights reserved. Riot Games, League of Legends and PvP.net are trademarks, services marks, or registered trademarks of Riot Games, Inc.