I would like to have a new option when creating multiplayer games. It happens often, that in a randomly determined team game in one team you can find the higher leveled players and in the other team the lower leveled ones. So it would be more nice (and fair) to have an option to equalize the players by their level (or even their related stats(if its a 3vs3, then the personal stats of their played 3vs3 games) are weighted.
E.g.: 6 players in a 3vs3. Their levels: 10, 20, 30, 40, 50, 60. So the outcome might be (depends on the algorithm): Team A: 10, 30, 60 (=100) Team B 20, 40, 50 (=110)

Level is not a good judge of skill.

Either join the 3v3 China league, create games with players you know of equal skill, or accept that random will get it right most of the time.

you can do it manually by moving players around before starting the game with a button, that way you can also discriminate in more ways than with level (e.g. by checking clan).
you may want to warn players that you will move them around, saying so in the game's discription.

Edited 4/25/2016 22:49:02

What TeeMee said: +10.