Just a thought
Now this may have been iterated somewhere along the line but ill reiterate for good ideas sake.
The number one reason i dont like queuing up for Summoners Rift are the arguements about who goes where...instalockers and the folks that dodge when they get 5th pick blue side...not to mention the "Mid or i Feed "folks.
How about a role select similar to WoW's dungeon finder...pick your role and wait in queue....i know this may drive queue times up a bit...but i for one would happily wait an extra 2-3 minutes and know that everyone is in the role they want and ready to play on a team level.
Maybe even have extra incentives for roles like support that gain additonal IP as there are few people who 'like' to support....
Just a thought