Helping with Game Play

I have a new idea that I would love to submit to the developers of League of Legends. However, an idea i submitted back in 2012 was recently implemented and I never even received a simple thank you, nice job, or even a "we were already thinking about that idea" If anything the idea was somewhat shunned upon, remastered and made a new. The idea is a little different from the idea I first proposed, but it has made League of Legends and overall better game. This new idea would do a lot for League and I want Riot to use it. Its a difficult one, but I believe if any company can do it, it would be Leagues.

So I guess this comes down to what im asking for? Well that would up for discussion. I would like to talk to someone in charge, crazy request I know, but it will be worth it.