A lot of people b!@#$ and moan about people being too good, including myself.
Create a game mode that takes the amount of time that you're logged into the game and allows you only into a certain group of players.
This way people who don't play as much can battle it out fairly, and on the other hand, would provide an opportunity those that play a lot to have a challenge.
Email me if you have a rebuttle, as I like constructive criticism:
[email protected]