I don't know if these additions is possible, but I think it would be cool to:
1. Be able to see the date a player last played a match. This way you can get an idea how active players are.
2. Get a diagram of the activity of a player, like hours played / day
3. maybe change the W/L-percantage to 88.5% instead of .885% (because that is ratio, not percentage)
4. position of most played games
5. It should be able to enable search player on their in-game name at least in the top 200
6. Sort the ladder on wins/losses/%/total/streak/drops/disputes
That's what I can think of now