Not sure if this was already suggested, but ill suggest it again since it may be more likely for the devs to see it.
The Leader board should be ranked by win percentage, to avoid a not so skilled player/guild to be at the top since all they may have done was play all day and lose but still get rank points while a person who is very good may have actually won quite often and be low in leader board due to them not playing as much. Should be something of the sort win percentage or similar.
Not that leader board is all that important but could make player/guild rivalry more interesting.