This is definitely needed. There needs to be a way of knowing the standard of who is in your game because an imbalanced game isn't much fun for anyone.
It would be a shame if new players get put off the game because they're unlucky and in their first few games they end up getting crushed at the hands of experienced people or raged at by "pro" teammates, and it is just boring for the better guys to continually roll people because they just aren't as experienced.
