Allow users to have 2 accounts, paying for both of course, one for casual games and other for speed games.
This I want because if I want to play for score, I cannot play speed games. But I want to play speed games!
How this will benefit the site and/or other comments:
More good players playing speed games!
To be honest I don't expect this suggestion to get serious attention to it, what I'm trying to do is to stir the debate on the score system. It'll be great to have 2 different scores, one for casual, other for speeds. I bet some guys have more creative ideas on the score system than me.