Bring back the 'Spectator window' on the client *THUMPPPSS THE F*** UP!!!*
I heard it was taken away after the release of the new client because of bugs/glitches. I'm not sure why Riot didn't find it necessary to fix because it really gave the game a sense of community (a lot more than it has now). Without that spectator window, I would have never heard of of people like Annie Bot, Irelia Carries U, or gave a damn to know about them anywhere else (not that I do now xD xD xD LE ECKS DEE!)
Before Riot released the limited edition skins to the public, I would always spectate games and be in awe as I saw skins I had never seen before. I wanted those skins so badly and would pay whatever $$$ it would take to get a hold of one. My friend would spectate games from the client when she was bored/and/or wanted to learn quickly without having to be a tryhard about it.
I always assumed Riot was working on a fix because LOGICALLY and NATURALLY in my mind, that feature is MANDATORY. When I learned Riot actually didn't give a shit I was surprised how they could just throw such an immersive and useful feature away.
I remember being a silver gragas player and spectating any game I could find that had a gragas challenger playing so I could see what is this mother fucker doing that I'm not? Oh.. not that much.
Bring it back please.
EDIT: I forgot to mention, realistically, this is something that ALL of us should want. If you ever thought about being a streamer or having your name known in the league community, THIS is the way to get the ball rolling.