Simply give players the option to disable gear stats in the setting menu for the 4v4 game modes. That way it wouldn't matter if a player was using a low leveled character against a prestige 20 and the only real difference would be player skill. This settles complaints against players attempting to level new characters or new comers to the game facing off against rep 3 and above players with maxed 108 gear stats. Everyone would be on equal footing when it comes to stats.