Direct-your-own LCS
I'd like to see riot implement an in-client system in which I can watch LCS games in the spectator mode format. This way, if I want to watch a jungler, I can watch him. If I want to watch bot lane, I can watch bot lane. If I want to only see the game from red side, I can see it that way. I can rewind 30 seconds if I want to, I can do all the things that are currently available in spectator mode.
It might be a bit of an undertaking to do it live, but I don't see any reason why this couldn't be offered in VOD format in the same way that my own current replays are currently available. Maybe one day, we could access a live feature. Maybe it could even be a paid service so Riot can make their money. (Everyone's gotta make money!) Perhaps the VOD format could be free a few days afterward, and the live service could be a paid subscription or a pay-per-view service.
I just really think it would improve my esports viewing experience if I was in control of what I'm watching.