Flat Characters & Storytelling
Flat characters aren't bad. They're just...are what they are. They don't change over the course of a story. How would you like to see characters change over time in league of legends -as opposed to remaining static?
This could give a further justification beyond what Riot Jeredan said for short introductory bios in client, and full stories out of client. Full stories could be kept out of client, and keep being added to so you know what is currently going on with a character. While in client, describing a character in a brief format would introduce who a character is purely conceptually.
, etc., all kind of have their things, and they do those things, and it works.
, and if they never bother accomplishing that, it just looks odd. It's weird to see Riven running around muttering about redeeming herself while doing absolutely nothing redeeming whatsoever, unless her greatest crime was her inablity to find a dumb bunny suit.