New Great Ideas
1.) I think League should add a feature where you can view replays of past games even if it doesn't hold many it would still be nice to watch replays without using a 3rd party program. And allow each player to take certain parts of a replay example: a pentakill or baron steal and save that part of a clip, and allow saving it to your hard drive.
2.) I think League should add a feature in chat where you can create groups and categorize friends into groups in chat and appear offline to either all friends or certain groups of friends.
3.) League of legends should add achievements: Example: In ranked get a pentakill, steal a baron by doing less then 5% of barons total health, etc. Then reward players for completing achievements with RP, IP, custom skins, icons, etc
4.) In leagues current Spectate mode riot should really add a dragon/baron kill score for each team to keep track of which teams have killed baron/dragon and how many times.