Champion Match History

I've been recently using the alpha client and I'm looking forward to everything Riot has to offer for it. However, I was thinking about it for a while and I asked myself,

"What if the last 5 games you played of a champion was in their info as well?"

I don't know if that's possible or if that would even work, but I thought it would be a great idea. If not that, at least like a k/d/a ratio just so then when people look through their champions, they have an idea on who they want to work on individually or need to improve on. I'm trying to be an all-around player, so that I can fill in any lane, but that idea has been in my head for a couple days and thought I might share it.

What do you guys think?