Unfortunately, I am afraid that the window for lore emphasis has sailed. With the introduction of Season 3 LCS, I doubt that a lore match would actually create enough excitement to merit the effort. Doesn't mean that I do not want it, though.
Realistically, Riot isn't going to go back to making the game lore-centric. The game is now less about where your character is in the story, and more about whether or not he is in position, or being a team player. I don't think it will ever go back.
But, guys like me and a lot of others I know still like our lore. While the game won't center around it anymore, it still helps to have a body of lore that one can enjoy if one so chooses. With the money Riot makes from the tournaments, I can't see that it would hurt to hire a full-time lore writer to deepen the characters and provide a bit of satisfaction for the lore-nerds that are intrigued by the characters they are playing.
I know I'm not the only person that would be interested in this job. Does Riot have some way of applying for this, or submitting a proposed work, or something like that?