Does really matter though? Players levels don't determine skill at all, just experience.
Higher level players get access to improvements, better weapons, etc. In the beta you reached the level cap at 14, and there was quite some disparity. It's going to be worse with even bigger differences between lower and higher players if they are not spread evenly between the teams.
It would be pretty easy and would improve the game if there were (for example) two high level players on each team, instead of all four on one side against a team of beginners.