Question: How does are teams setup now/in the future?

I've always wondering how teams are setup in the game. I'm guessing that the main goal is to try to keep parties together, right? I know that's part of the fix coming out soon.

But when that happens, since the game doesn't try to find new players every match, what happens when you go into a game with 6 lvl 99s in a party and get crushed every game? Why keep playing?

Or what if they're not all in a party but the best players regularly get put on a team together? How does the game try to balance things out?

I keep hoping/wondering how trying to get average Kill/Death rates would work. If the average K/D rate of one non-partied team is 2.4 and the other is .9 it's pretty obvious who is going to win that match.

Anybody know what is in the works for the future, or what the current sorting system is?